310 results match your criteria External Pacemakers


Direct Powering a Real Cardiac Pacemaker by Natural Energy of a Heartbeat.

ACS Nano 2019 Mar 20;13(3):2822-2830. Epub 2019 Feb 20.

Institute of Cardiothoracic Surgery at Changhai Hospital , Second Military Medical University , Shanghai 200433 , China.

Implantable medical devices are widely used for monitoring and treatment of severe diseases. In particular, an implantable cardiac pacemaker is the most effective therapeutic device for treating bradyrhythmia, however its surgical replacement is inevitable every 5-12 years due to the limited life of the built-in battery. Although several approaches of energy harvesting have been explored in this decade for powering cardiac pacemakers, the modern, commercial, and full-function pacemaker has never been powered effectively yet. Read More

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http://pubs.acs.org/doi/10.1021/acsnano.8b08567
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http://dx.doi.org/10.1021/acsnano.8b08567DOI Listing
March 2019
6 Reads
12.881 Impact Factor

MRI for patients with cardiac implantable electronic devices: simplifying complexity with a 'one-stop' service model.

BMJ Qual Saf 2019 Feb 13. Epub 2019 Feb 13.

Department of Cardiac Imaging, Barts Heart Centre, Barts Health NHS Trust, London, UK.

Background: Patients with cardiac pacemakers and defibrillators are disadvantaged because of poor access to MRI scans, leading to late and misdiagnosis particularly for cancer and neurological disease. New technology allied to tested protocols now allows safe MRI scanning of such patients; however, logistical barriers persist.

Aim: To deliver a streamlined sustainable service that provides timely MRI scans to patients with cardiac implantable electronic devices (CIEDs). Read More

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http://dx.doi.org/10.1136/bmjqs-2018-009079DOI Listing
February 2019
3 Reads

A randomized trial evaluating the accuracy of AF detection by four external ambulatory ECG monitors compared to permanent pacemaker AF detection.

J Interv Card Electrophysiol 2019 Feb 11. Epub 2019 Feb 11.

Eastbourne General Hospital, East Sussex Healthcare NHS Trust, East Sussex, UK.

Purpose: Several external cardiac monitors (ECMs) have recently been developed. These have never been compared to 'gold standard' monitoring with concurrently implanted DDDRP pacemakers. The accuracy of AF detection of Zio XT Monitor (ZM), NUUBO Vest (NV) and Carnation Ambulatory Monitor (CAM) compared with Novacor 'R' Test 4 (RT) in patients (pts) with DDDRP PPM advanced Holters as the comparator, was evaluated. Read More

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http://dx.doi.org/10.1007/s10840-019-00515-0DOI Listing
February 2019

Mechanisms of Communication in the Mammalian Circadian Timing System.

Int J Mol Sci 2019 Jan 15;20(2). Epub 2019 Jan 15.

Institute of Neurobiology, Center of Brain, Behavior and Metabolism, University of Lübeck, Marie-Curie-Straße, 23562 Lübeck, Germany.

24-hour rhythms in physiology and behaviour are organized by a body-wide network of endogenous circadian clocks. In mammals, a central pacemaker in the hypothalamic suprachiasmatic nucleus (SCN) integrates external light information to adapt cellular clocks in all tissues and organs to the external light-dark cycle. Together, central and peripheral clocks co-regulate physiological rhythms and functions. Read More

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http://dx.doi.org/10.3390/ijms20020343DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6359556PMC
January 2019

Experimental Phantom-Based Security Analysis for Next-Generation Leadless Cardiac Pacemakers.

Sensors (Basel) 2018 Dec 7;18(12). Epub 2018 Dec 7.

iTEAM, Universitat Politècnica de València, 46022 Valencia, Spain.

With technological advancement, implanted medical devices can treat a wide range of chronic diseases such as cardiac arrhythmia, deafness, diabetes, etc. Cardiac pacemakers are used to maintain normal heart rhythms. The next generation of these pacemakers is expected to be completely wireless, providing new security threats. Read More

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http://dx.doi.org/10.3390/s18124327DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6308590PMC
December 2018

Biological pacemakers: Concepts and techniques.

Natl Med J India 2017 Nov-Dec;30(6):324-326

Department of Cardiology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow 226014, Uttar Pradesh, India.

The sinoatrial (SA) node is the dominant pacemaker of the heart which initiates the process of impulse generation in the cardiac tissue, thereby defining the rate and rhythm of cardiac contraction. The automaticity of the conduction cells in the SA node is due to ion channels which are inter-linked by molecular, histological and electrophysiological mechanisms causing spontaneous diastolic depolarization and generation of an impulse. The SA nodal action potentials are then transmitted to the ventricles by electrical coupling of the myocytes in different areas of the heart. Read More

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http://dx.doi.org/10.4103/0970-258X.239072DOI Listing
December 2018
13 Reads

Long-term monitoring to detect atrial fibrillation with the indwelling implantable cardiac monitors.

Authors:
Tommaso Sanna

Int J Stroke 2018 12 9;13(9):893-904. Epub 2018 Aug 9.

Universita Cattolica del Sacro Cuore, Rome, Italy.

An increasing number of detection tools are available and several detection strategies have been described to pursue the diagnosis of atrial fibrillation to prevent ischemic stroke. Monitoring tools include standard electrocardiography, snapshot single-lead recordings with professional or personal devices (e.g. Read More

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http://dx.doi.org/10.1177/1747493018790023DOI Listing
December 2018
3 Reads

External electrical cardioversion in patients with cardiac implantable electronic devices: Is it safe and is immediate device interrogation necessary?

Pacing Clin Electrophysiol 2018 10 28;41(10):1336-1340. Epub 2018 Aug 28.

Department of Cardiology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center (MUMC+), Maastricht, The Netherlands.

Background: Atrial tachyarrhythmias are common in patients with cardiac implantable electronic devices (CIEDs). Restoration of sinus rhythm by external electrical cardioversion (eECV) is frequently used to alleviate symptoms and to ensure optimal device function.

Objectives: To evaluate the safety of eECV in patients with contemporary CIEDs and to assess the need for immediate device interrogation after eECV. Read More

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http://dx.doi.org/10.1111/pace.13467DOI Listing
October 2018
2 Reads

Survival and weak chaos.

Authors:
Sean Nee

R Soc Open Sci 2018 May 16;5(5):172181. Epub 2018 May 16.

The Braithwaite Group in: Department of Ecosystem Science and Management, The Pennsylvania State University, 410 Forest Resources Building, University Park, PA 16802, USA.

Survival analysis in biology and reliability theory in engineering concern the dynamical functioning of bio/electro/mechanical units. Here we incorporate effects of chaotic dynamics into the classical theory. Dynamical systems theory now distinguishes strong and weak chaos. Read More

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http://rsos.royalsocietypublishing.org/lookup/doi/10.1098/rs
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http://dx.doi.org/10.1098/rsos.172181DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5990807PMC
May 2018
5 Reads

Permanent-temporary pacemakers in the management of patients with conduction abnormalities after transcatheter aortic valve replacement.

J Interv Card Electrophysiol 2018 Jun 12;52(1):111-116. Epub 2018 Mar 12.

Cedars-Sinai Heart Institute, 8700 Beverly Blvd, Suite 5512, Los Angeles, CA, 90048, USA.

Background: Damage to the cardiac conduction system requiring permanent pacemaker (PPM) implantation is a known adverse outcome of transcatheter aortic valve replacement (TAVR). A permanent-temporary pacemaker (PTPM) is a device that involves an active-fixation lead attached to an external pulse generator taped to the skin. We reviewed the utility of PTPMs as a temporary bridge measure after TAVR in patients with conduction abnormalities that do not meet conventional criteria for PPM placement. Read More

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http://dx.doi.org/10.1007/s10840-018-0345-zDOI Listing
June 2018
5 Reads

Spontaneous circadian rhythms in a cold-adapted natural isolate of Aureobasidium pullulans.

Sci Rep 2017 Oct 23;7(1):13837. Epub 2017 Oct 23.

Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires, Argentina.

Circadian systems enable organisms to synchronize their physiology to daily and seasonal environmental changes relying on endogenous pacemakers that oscillate with a period close to 24 h even in the absence of external timing cues. The oscillations are achieved by intracellular transcriptional/translational feedback loops thoroughly characterized for many organisms, but still little is known about the presence and characteristics of circadian clocks in fungi other than Neurospora crassa. We sought to characterize the circadian system of a natural isolate of Aureobasidium pullulans, a cold-adapted yeast bearing great biotechnological potential. Read More

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http://dx.doi.org/10.1038/s41598-017-14085-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5653790PMC
October 2017
25 Reads

A telemonitoring platform for the investigation of blood pressure profiles in pacemaker patients.

Conf Proc IEEE Eng Med Biol Soc 2016 08;2016:211-214

Rate responsive pacemakers (PM) use different strategies to adapt the patient paced rate, with the aim of having the best hemodynamic performance in response to internal or external conditions. Closed-loop stimulation (CLS) uses intracardiac impedance as a sensor principle. The evaluation of impact of different pacing modalities and technologies on the blood pressure (BP) profiles is mainly investigated in short-term laboratory settings, mainly due to the need of reliable daily-based BP values. Read More

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http://dx.doi.org/10.1109/EMBC.2016.7590677DOI Listing
August 2016
8 Reads

Cardiac Pacemakers: Function, Troubleshooting, and Management: Part 1 of a 2-Part Series.

J Am Coll Cardiol 2017 Jan;69(2):189-210

Department of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota. Electronic address:

Advances in cardiac surgery toward the mid-20th century created a need for an artificial means of stimulating the heart muscle. Initially developed as large external devices, technological advances resulted in miniaturization of electronic circuitry and eventually the development of totally implantable devices. These advances continue to date, with the recent introduction of leadless pacemakers. Read More

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http://dx.doi.org/10.1016/j.jacc.2016.10.061DOI Listing
January 2017
12 Reads

Measuring dose from radiotherapy treatments in the vicinity of a cardiac pacemaker.

Phys Med 2016 Dec 21;32(12):1529-1536. Epub 2016 Nov 21.

Royal Brisbane and Women's Hospital, Butterfield Street, Herston, QLD 4029, Australia; School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia.

This study investigated the dose absorbed by tissues surrounding artificial cardiac pacemakers during external beam radiotherapy procedures. The usefulness of out-of-field reference data, treatment planning systems, and skin dose measurements to estimate the dose in the vicinity of a pacemaker was also examined. Measurements were performed by installing a pacemaker onto an anthropomorphic phantom, and using radiochromic film and optically stimulated luminescence dosimeters to measure the dose in the vicinity of the device during the delivery of square fields and clinical treatment plans. Read More

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http://dx.doi.org/10.1016/j.ejmp.2016.11.010DOI Listing
December 2016
19 Reads

Recommendations for Lengthening of Magnetically Controlled Growing Rods in Children With Pacemakers.

J Pediatr Orthop 2017 Jun;37(4):e250-e254

*Exeter Spine Unit, Princess Elizabeth Orthopaedic Centre, Royal Devon and Exeter NHS Foundation Trust, Exeter ‡The James Cook University Hospital, Middlesbrough, United Kingdom †Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia.

Purpose Of The Study: Pacemakers are currently identified as a contraindication for the use of magnetic growth rods (MGRs). This arises from concern that magnetic fields generated by the MGR external remote controller (ERC) during lengthening procedures may induce pacemaker dysfunction. We investigated (1) whether MGR lengthening affects pacemaker function, and (2) if the magnetic field of a pacemaker affects MGR lengthening. Read More

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http://dx.doi.org/10.1097/BPO.0000000000000872DOI Listing
June 2017
4 Reads

Transcatheter Leadless Cardiac Pacing in Renal Failure with Limited Venous Access.

Pacing Clin Electrophysiol 2016 Nov 9;39(11):1281-1284. Epub 2016 Jun 9.

Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong SAR, China.

Entirely leadless cardiac pacemakers that are delivered transvenously required the use of large-diameter delivery sheath and femoral venous approach. The complexity of external femoral and iliac venous anatomy may limit their implantation. We describe a hemodialysis patient without subclavian venous access and a conventional pacemaker with a failed right ventricular lead, who had difficult iliac venous anatomy that was also compressed by an external endovascular abdominal aortic stent. Read More

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http://dx.doi.org/10.1111/pace.12895DOI Listing
November 2016
3 Reads

Chronotype, gender and general health.

Chronobiol Int 2016 5;33(7):863-82. Epub 2016 May 5.

a School of Medicine , University of Ferrara , Ferrara , Italy.

Background: Light-dark alternation has always been the strongest external circadian "zeitgeber" for humans. Due to its growing technological preference, our society is quickly transforming toward a progressive "eveningness" (E), with consequences on personal circadian preference (chronotype), depending on gender as well. The aim of this study was to review the available evidence of possible relationships between chronotype and gender, with relevance on disturbances that could negatively impact general health, including daily life aspects. Read More

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http://dx.doi.org/10.1080/07420528.2016.1176927DOI Listing
January 2018
24 Reads

Influence of metallic artifact filtering on MEG signals for source localization during interictal epileptiform activity.

J Neural Eng 2016 Apr 2;13(2):026029. Epub 2016 Mar 2.

Department of Automatic Control (ESAII), Biomedical Engineering Research Center (CREB), Universitat Politènica de Catalunya (UPC), Barcelona, Spain. Biomedical Research Networking center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain.

Objective: Medical intractable epilepsy is a common condition that affects 40% of epileptic patients that generally have to undergo resective surgery. Magnetoencephalography (MEG) has been increasingly used to identify the epileptogenic foci through equivalent current dipole (ECD) modeling, one of the most accepted methods to obtain an accurate localization of interictal epileptiform discharges (IEDs). Modeling requires that MEG signals are adequately preprocessed to reduce interferences, a task that has been greatly improved by the use of blind source separation (BSS) methods. Read More

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http://dx.doi.org/10.1088/1741-2560/13/2/026029DOI Listing
April 2016
7 Reads

Are implantable cardiac monitors the 'gold standard' for atrial fibrillation detection? A prospective randomized trial comparing atrial fibrillation monitoring using implantable cardiac monitors and DDDRP permanent pacemakers in post atrial fibrillation ablation patients.

Europace 2016 Jul 18;18(7):1000-5. Epub 2015 Nov 18.

Cardiology Research Department, East Sussex Healthcare NHS Trust, Eastbourne Gen Hospital, East Sussex, UK

Aims: Implantable devices are widely accepted, but not proven, to be the most reliable monitoring method to assess atrial fibrillation (AF) therapies. We compared REVEAL(®)XT implantable cardiac monitors (ICMs) and permanent pacemakers (PPMs).

Methods And Results: Fifty patients with paroxysmal AF were randomized to ICM or PPM implant 6 weeks prior to pulmonary vein isolation. Read More

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http://dx.doi.org/10.1093/europace/euv367DOI Listing
July 2016
22 Reads

Low incidence of complications after cephalic vein cutdown for pacemaker lead implantation in children weighing less than 10 kilograms: A single-center experience with long-term follow-up.

Heart Rhythm 2015 Aug 23;12(8):1820-6. Epub 2015 Apr 23.

Referral Pacemaker Center, Clinical Center of Serbia, Belgrade, Serbia; University of Belgrade, School of Medicine, Belgrade, Serbia.

Background: Only a few studies on the cephalic vein cutdown technique for pacemaker lead implantation in children weighing ≤10 kg have been reported even though the procedure is widely accepted in adults.

Objective: The purpose of this study was to prove that cephalic vein cutdown for pacemaker lead implantation is a reliable technique with a low incidence of complications in children weighing ≤10 kg.

Methods: The study included 44 children weighing ≤10 kg with an endocardial pacemaker. Read More

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http://dx.doi.org/10.1016/j.hrthm.2015.04.025DOI Listing
August 2015
25 Reads

Sustaining cyborgs: sensing and tuning agencies of pacemakers and implantable cardioverter defibrillators.

Authors:
Nelly Oudshoorn

Soc Stud Sci 2015 Feb;45(1):56-76

Recently there has been a renewed interest in cyborgs, and particularly in new and emerging fusions of humans and technologies related to the development of human enhancement technologies. These studies reflect a trend to follow new and emerging technologies. In this article, I argue that it is important to study 'older' and more familiar cyborgs as well. Read More

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http://sss.sagepub.com/content/45/1/56.full.pdf
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http://dx.doi.org/10.1177/0306312714557377DOI Listing
February 2015
4 Reads

DEGRO/DGK guideline for radiotherapy in patients with cardiac implantable electronic devices.

Strahlenther Onkol 2015 May 5;191(5):393-404. Epub 2015 Mar 5.

Klinik für Strahlentherapie und Radioonkologie, Universitätsmedizin Mannheim, Ruprecht-Karls-Universität Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Deutschland,

An increasing number of patients undergoing radiotherapy (RT) have cardiac implantable electronic devices [CIEDs, cardiac pacemakers (PMs) and implanted cardioverters/defibrillators (ICDs)]. Ionizing radiation can cause latent and permanent damage to CIEDs, which may result in loss of function in patients with asystole or ventricular fibrillation. Reviewing the current literature, the interdisciplinary German guideline (DEGRO/DGK) was developed reflecting patient risk according to type of CIED, cardiac condition, and estimated radiation dose to the CIED. Read More

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http://leitlinien.dgk.org/files/2015_Stellungnahme_leitlinie
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http://link.springer.com/10.1007/s00066-015-0817-3
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http://dx.doi.org/10.1007/s00066-015-0817-3DOI Listing
May 2015
17 Reads

Defibrillator Deactivation against a Patient's Wishes: Perspectives of Electrophysiology Practitioners.

Pacing Clin Electrophysiol 2015 Aug 16;38(8):917-24. Epub 2015 Mar 16.

University of Pennsylvania, Philadelphia, Pennsylvania.

Background: Unilateral do-not-resuscitate (DNR) orders (against patient/family wishes) have been ethically justified in cases of medical futility. We investigated whether electrophysiology practitioners believe medical futility justifies unilateral implantable cardioverter defibrillator (ICD) deactivation.

Methods And Results: Email invitations to take an online survey were sent to 1,894 electrophysiology practitioners. Read More

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http://dx.doi.org/10.1111/pace.12614DOI Listing
August 2015
5 Reads

Automatic frequency controller for power amplifiers used in bio-implanted applications: issues and challenges.

Sensors (Basel) 2014 Dec 11;14(12):23843-70. Epub 2014 Dec 11.

Department of Electrical, Electronic & Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi Selangor, Malaysia.

With the development of communication technologies, the use of wireless systems in biomedical implanted devices has become very useful. Bio-implantable devices are electronic devices which are used for treatment and monitoring brain implants, pacemakers, cochlear implants, retinal implants and so on. The inductive coupling link is used to transmit power and data between the primary and secondary sides of the biomedical implanted system, in which efficient power amplifier is very much needed to ensure the best data transmission rates and low power losses. Read More

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http://dx.doi.org/10.3390/s141223843DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4299090PMC
December 2014
19 Reads

Risk of device malfunction in cancer patients with implantable cardiac device undergoing radiotherapy: a population-based cohort study.

Pacing Clin Electrophysiol 2015 Mar 20;38(3):343-56. Epub 2015 Jan 20.

Department of Cardiology, Center for Cardiovascular Research, Aalborg University Hospital, Aalborg, Denmark.

Background: Pacemakers (PMs) and implantable cardioverter defibrillators (ICDs) may develop malfunction during external beam radiotherapy (RT). We aimed to describe clinical practice in PM/ICD patients undergoing RT and to assess the rate and predictors of device malfunctions.

Methods: We reviewed medical records of all PM/ICD patients undergoing RT at four centers in Western Denmark during 2003-2012. Read More

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http://doi.wiley.com/10.1111/pace.12572
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http://dx.doi.org/10.1111/pace.12572DOI Listing
March 2015
7 Reads

Role of long cycles in excitable dynamics on graphs.

Phys Rev E Stat Nonlin Soft Matter Phys 2014 Nov 10;90(5-1):052805. Epub 2014 Nov 10.

School of Engineering and Science, Jacobs University Bremen, D-28759 Bremen, Germany.

Topological cycles in excitable networks can play an important role in maintaining the network activity. When properly activated, cycles act as dynamic pacemakers, sustaining the activity of the whole network. Most previous research has focused on the contributions of short cycles to network dynamics. Read More

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https://link.aps.org/doi/10.1103/PhysRevE.90.052805
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http://dx.doi.org/10.1103/PhysRevE.90.052805DOI Listing
November 2014
8 Reads

The Role of Continuous Monitoring in Atrial Fibrillation Management.

Authors:
A John Camm

Arrhythm Electrophysiol Rev 2014 May 30;3(1):48-50. Epub 2014 May 30.

Professor of Clinical Cardiology, Cardiac and Vascular Sciences, St. George's University of London, London, UK.

Atrial fibrillation (AF) is the most common cardiac arrhythmia and is strongly associated with stroke risk and a variety of cardiovascular conditions. AF early detection is of paramount importance, in order to define proper medical treatment. This can be challenging due to the often silent and intermittent nature of the rhythm disturbance. Read More

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http://dx.doi.org/10.15420/aer.2011.3.1.48DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4711543PMC
May 2014
3 Reads

Safety of the colonoscope magnetic imaging device (ScopeGuide) in patients with implantable cardiac devices.

Endoscopy 2014 Feb 29;46(2):135-8. Epub 2014 Jan 29.

Department of Gastroenterology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom.

Background And Study Aims: Use of the colonoscope magnetic imaging device (ScopeGuide, Olympus Medical Systems, Tokyo, Japan) is currently contraindicated by the manufacturer for patients with implantable cardiac devices, a group of patients that is increasing annually along with the number of colonoscopies performed in the era of colorectal cancer screening. This is the first study to examine the safety of ScopeGuide in patients with permanent pacemakers, implantable cardioverter defibrillators, and cardiac resynchronization therapy.

Patients And Methods: Nonimplanted cardiac devices were exposed to the electromagnetic field of ScopeGuide ex vivo and assessed for evidence of interference or change in device settings. Read More

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http://dx.doi.org/10.1055/s-0033-1359044DOI Listing
February 2014
9 Reads

Effects of external electrical and magnetic fields on pacemakers and defibrillators: from engineering principles to clinical practice.

Circulation 2013 Dec;128(25):2799-809

Section for Cardiac Electrophysiology, Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, MD. (R.B., S.N.); and Davidai Arrhythmia Center, Leviev Heart Center, Sheba Medical Center, Tel Aviv University, Tel Hashomer, Israel (R.B.).

The overall risk of clinically significant adverse events related to EMI in recipients of CIEDs is very low. Therefore, no special precautions are needed when household appliances are used. Environmental and industrial sources of EMI are relatively safe when the exposure time is limited and distance from the CIEDs is maximized. Read More

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http://dx.doi.org/10.1161/CIRCULATIONAHA.113.005697DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3908865PMC
December 2013
3 Reads

Thrombogenic catheter-associated superior vena cava syndrome.

Case Rep Emerg Med 2013 1;2013:793054. Epub 2013 Oct 1.

Department of Emergency Medicine, The Ohio State University Medical Center, 750 Prior Hall, 376 W 10th Avenue, Columbus, OH 43210, USA.

Superior vena cava syndrome has historically been associated with malignancy. With the increasing use of indwelling central lines, catheters, and pacemakers in the past decade, there have been an increasing number of cases associated with thrombosis rather than by direct external compression. Patients presenting to the ED with an acute process of SVC syndrome need to be assessed in a timely fashion. Read More

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http://dx.doi.org/10.1155/2013/793054DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3806322PMC
November 2013
6 Reads

Testing of common electromagnetic environments for risk of interference with cardiac pacemaker function.

Saf Health Work 2013 Sep 20;4(3):156-9. Epub 2013 Jul 20.

Safe New Technologies, Finnish Institute of Occupational Health, Helsinki, Finland.

Background: Cardiac pacemakers are known to be susceptible to strong electromagnetic fields (EMFs). This in vivo study investigated occurrence of electromagnetic interference with pacemakers caused by common environmental sources of EMFs.

Methods: Eleven volunteers with a pacemaker were exposed to EMFs produced by two mobile phone base stations, an electrically powered commuter train, and an overhead high voltage transmission lines. Read More

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http://dx.doi.org/10.1016/j.shaw.2013.06.002DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3791084PMC
September 2013
39 Reads

Adhoc electromagnetic compatibility testing of non-implantable medical devices and radio frequency identification.

Biomed Eng Online 2013 Jul 11;12:71. Epub 2013 Jul 11.

Background: The use of radiofrequency identification (RFID) in healthcare is increasing and concerns for electromagnetic compatibility (EMC) pose one of the biggest obstacles for widespread adoption. Numerous studies have documented that RFID can interfere with medical devices. The majority of past studies have concentrated on implantable medical devices such as implantable pacemakers and implantable cardioverter defibrillators (ICDs). Read More

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http://dx.doi.org/10.1186/1475-925X-12-71DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3716957PMC
July 2013
17 Reads

Hacking medical devices a review - biomed 2013.

Authors:
Paul Frenger

Biomed Sci Instrum 2013 ;49:40-7

A Working Hypothesis.

Programmable, implantable and external biomedical devices (such as pacemakers, defibrillators, insulin pumps, pain management pumps, vagus nerve stimulators and others) may be vulnerable to unauthorized access, commonly referred to as “hacking”. This intrusion may lead to compromise of confidential patient data or loss of control of the device itself, which may be deadly. Risks to health from unauthorized access is in addition to hazards from faulty (“buggy”) software or circuitry. Read More

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February 2016
6 Reads

Control of bursting synchronization in networks of Hodgkin-Huxley-type neurons with chemical synapses.

Phys Rev E Stat Nonlin Soft Matter Phys 2013 Apr 16;87(4):042713. Epub 2013 Apr 16.

Departament of Physics, Federal University of Paraná, Curitiba, Paraná, Brazil.

Thermally sensitive neurons present bursting activity for certain temperature ranges, characterized by fast repetitive spiking of action potential followed by a short quiescent period. Synchronization of bursting activity is possible in networks of coupled neurons, and it is sometimes an undesirable feature. Control procedures can suppress totally or partially this collective behavior, with potential applications in deep-brain stimulation techniques. Read More

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http://dx.doi.org/10.1103/PhysRevE.87.042713DOI Listing
April 2013
6 Reads

Phase precession of grid cells in a network model without external pacemaker.

Hippocampus 2013 Sep 23;23(9):786-96. Epub 2013 May 23.

Department Biology II, Ludwig-Maximilians-University, Munich, Germany; Bernstein Center for Computational Neuroscience, Munich, Germany.

Rodent brains encode space in both the firing rate and the spike timing of neurons in the medial entorhinal cortex. The rate code is realized by grid fields, that is, the neurons fire at multiple places that are arranged on a hexagonal lattice. Such activity is accompanied by theta oscillations of the local field potential. Read More

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http://dx.doi.org/10.1002/hipo.22133DOI Listing
September 2013
8 Reads

Identifying constraints in the evolution of primate societies.

Authors:
Bernard Thierry

Philos Trans R Soc Lond B Biol Sci 2013 May 8;368(1618):20120342. Epub 2013 Apr 8.

Centre National de la Recherche Scientifique, Département Ecologie, Physiologie et Ethologie, Strasbourg 67000, France.

The evolutionary study of social systems in non-human primates has long been focused on ecological determinants. The predictive value of socio-ecological models remains quite low, however, in particular because such equilibrium models cannot integrate the course of history. The use of phylogenetic methods indicates that many patterns of primate societies have been conserved throughout evolutionary history. Read More

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http://dx.doi.org/10.1098/rstb.2012.0342DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3638445PMC
May 2013
4 Reads

Central control of peripheral circadian oscillators.

Curr Opin Neurobiol 2013 Oct 26;23(5):741-6. Epub 2013 Mar 26.

Department of Biology, University of Virginia, Charlottesville, VA, United States. Electronic address:

The suprachiasmatic nucleus of the hypothalamus and at least two other unidentified central pacemakers regulate the temporal structure of a circadian network that involves almost every organ in the body. Phase control is central to the efficient function of this system. Individual circadian oscillators in tissues and organs in the periphery bear adaptive phase relationships to the external light cycle, the central pacemakers and to each other. Read More

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http://dx.doi.org/10.1016/j.conb.2013.03.003DOI Listing
October 2013
6 Reads

Utility and safety of temporary pacing using active fixation leads and externalized re-usable permanent pacemakers after lead extraction.

Europace 2013 Sep 12;15(9):1287-91. Epub 2013 Mar 12.

San Diego Health System, Sulpizio Cardiovascular Center, University of California, 9444 Medical Center Dr. MC 7411, La Jolla, CA 92037, USA.

Aims: After extraction of an infected cardiac implantable electronic device (CIED) in a pacemaker-dependent patient, a temporary pacemaker wire may be required for long periods during antibiotic treatment. Loss of capture and under sensing are commonly observed over time with temporary pacemaker wires, and patient mobility is restricted. The use of an externalized permanent active-fixation pacemaker lead connected to a permanent pacemaker generator for temporary pacing may be beneficial because of improved lead stability, and greater patient mobility and comfort. Read More

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http://dx.doi.org/10.1093/europace/eut045DOI Listing
September 2013
12 Reads
2 Citations
3.050 Impact Factor

Implanted intrathecal drug delivery systems and radiation treatment.

Pain Med 2013 Mar 21;14(3):398-402. Epub 2013 Feb 21.

Departments of Pain, MDACC, Houston, TX 77030, USA.

Purpose: Radiotherapy affects the functioning of pacemakers. Guidelines based on dosimetric data exist regarding tolerable doses to pacemakers. Little is known about the effects of radiation on implantable drug delivery systems (IDDS). Read More

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http://dx.doi.org/10.1111/pme.12037DOI Listing
March 2013
4 Reads

[Inappropriate analyses of automated external defibrillators used during out-of-hospital cardiac arrests].

Aten Primaria 2013 Apr 23;45(4):193-8. Epub 2012 Dec 23.

Bilbao SAMUR-Protección Civil, Bilbao, Vizcaya, España.

Objective: To estimate the frequency of therapeutic errors and to evaluate the diagnostic accuracy in the recognition of shockable rhythms by automated external defibrillators.

Design: A retrospective descriptive study.

Setting: Nine basic life support units from Biscay (Spain). Read More

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http://dx.doi.org/10.1016/j.aprim.2012.11.005DOI Listing
April 2013
1 Read

Electromagnetic interference with cardiac pacemakers and implantable cardioverter-defibrillators from low-frequency electromagnetic fields in vivo.

Europace 2013 Mar 1;15(3):388-94. Epub 2012 Nov 1.

Safe New Technologies, Finnish Institute of Occupational Health, Topeliuksenkatu 41 a A, 00250 Helsinki, Finland.

Aims: Electromagnetic interference (EMI) can pose a danger to workers with pacemakers and implantable cardioverter-defibrillators (ICDs). At some workplaces electromagnetic fields are high enough to potentially inflict EMI. The purpose of this in vivo study was to evaluate the susceptibility of pacemakers and ICDs to external electromagnetic fields. Read More

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http://dx.doi.org/10.1093/europace/eus345DOI Listing
March 2013
14 Reads

Feasibility of retroreflective transdermal optical wireless communication.

Appl Opt 2012 Jun;51(18):4232-9

Electrical and Computer Engineering Department, Ben-Gurion University of the Negev, Beer Sheva, Israel.

There is an increasing demand for transdermal high-data-rate communication for use with in-body devices, such as pacemakers, smart prostheses, neural signals processors at the brain interface, and cameras acting as artificial eyes as well as for collecting signals generated within the human body. Prominent requirements of these communication systems include (1) wireless modality, (2) noise immunity and (3) ultra-low-power consumption for the in-body device. Today, the common wireless methods for transdermal communication are based on communication at radio frequencies, electrical induction, or acoustic waves. Read More

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http://dx.doi.org/10.1364/AO.51.004232DOI Listing
June 2012
33 Reads

Performance of atrial tachyarrhythmia-sensing algorithms in dual-chamber pacing using a fixed long AV delay in patients with sinus node dysfunction.

J Interv Card Electrophysiol 2012 Nov 12;35(2):207-13. Epub 2012 Jun 12.

Department of Cardiology, Meilahti Hospital, Helsinki University Central Hospital, Haartmaninkatu 4, P.O. Box 340, 00029 HUS, Helsinki, Finland.

Aims: The aim of the study was to evaluate the performance of pacemakers (PM) atrial tachyarrhythmia (AT)-sensing algorithms in sinus node dysfunction (SND) patients with DDDR pacing programmed with a fixed long atrioventricular (AV) delay.

Methods: In a prospective study, a total of 60 patients with SND were implanted with a dual-chamber PM with two different algorithms for detection of ATs. The study was done with a 3 month data collection period retrieved from the memory of PM and with a 7 day external Holter recording period. Read More

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http://link.springer.com/10.1007/s10840-012-9691-4
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http://dx.doi.org/10.1007/s10840-012-9691-4DOI Listing
November 2012
6 Reads

Experimental study on malfunction of pacemakers due to exposure to different external magnetic fields.

J Interv Card Electrophysiol 2012 Jun 11;34(1):19-27. Epub 2012 Jan 11.

Safe New Technologies, Finnish Institute of Occupational Health, Topeliuksenkatu 41 a A, 00250, Helsinki, Finland.

Purpose: Cardiac pacemaker malfunction due to exposure to magnetic fields may cause serious problems in some work environments for workers having cardiac pacemakers. The aim of this study was to find the magnetic field interference thresholds for several commonly used pacemaker models.

Methods: We investigated 16 pacemakers from three different manufacturers with the frequency range of 2 to 1,000 Hz, using sinusoidal, pulse, ramp, and square waveforms. Read More

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http://dx.doi.org/10.1007/s10840-011-9651-4DOI Listing
June 2012
8 Reads

Anaesthetic management of abdominal hysterectomy in patient with congenital sinus node dysfunction.

J Coll Physicians Surg Pak 2011 Dec;21(12):760-2

Department of Anaesthesia, The Aga Khan University Hospital, Karachi.

A 45 years old woman having dysfunctional uterine bleeding was scheduled for total abdominal hysterectomy with bilateral salpingo-oophorectomy under general anaesthesia. On pre-operative anaesthesia assessment, she was found to have junctional rhythm at rate of 44 beats/minute with bigeminies and pre-mature ventricular contractions on ECG. On further evaluation, she was diagnosed as having congenital sinus node dysfunction on the basis of 24 hours Holter monitoring. Read More

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http://dx.doi.org/12.2011/JCPSP.760762DOI Listing
December 2011
5 Reads

Capability of a new paediatric oesophageal Doppler monitor to detect changes in cardiac output during testing of external pacemakers after cardiac surgery.

J Clin Monit Comput 2011 Dec 12;25(6):419-25. Epub 2011 Nov 12.

Department of Congenital Heart Disease/Paediatric Cardiology, Deutsches Herzzentrum Berlin, Augustenburger Platz 1, 13353, Berlin, Germany.

Background: The Cardio QP™ oesophageal Doppler monitor measures the velocity time integral of the blood flow in the descending aorta. Based on system integrated normograms of the aortic cross-sectional area of a paediatric population, the cardiac output is calculated and displayed.

Objective: Evaluation of the capability of the Cardio QP™ to detect changes in cardiac output during desynchronizing ventricular pacing (VVI) in children after cardiac surgery. Read More

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http://link.springer.com/10.1007/s10877-011-9322-0
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http://dx.doi.org/10.1007/s10877-011-9322-0DOI Listing
December 2011
13 Reads