147 results match your criteria pulsations revealed


Novel atrioventricular sequential pacing approach using a transvenous atrial pacemaker and a leadless pacemaker: a case report.

Eur Heart J Case Rep 2021 Jul 19;5(7):ytab219. Epub 2021 Jul 19.

Manchester Heart Centre, Manchester Royal Infirmary, Oxford Road, Manchester M13 9WL, UK.

Background: The use of transvenous pacing leads is associated with the risk of developing tricuspid valve (TV) dysfunction. This develops through several mechanisms including the failure of leaflet coaptation or direct damage to the TV or to its sub-valvular apparatus and can result in significant tricuspid regurgitation (TR). Multiple approaches to pacemaker implantation after transvenous lead extraction (TLE) or surgical TV repair have been described. Read More

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Mechanical activities of self-beating cardiomyocyte aggregates under mechanical compression.

Sci Rep 2021 Jul 26;11(1):15159. Epub 2021 Jul 26.

Osaka University, 1-3 Yamadaoka, Suita, Osaka, 565-0871, Japan.

Since the discovery of synchronous pulsations in cardiomyocytes (CMs), electrical communication between CMs has been emphasized; however, recent studies suggest the possibility of mechanical communication. Here, we demonstrate that spherical self-beating CM aggregates, termed cardiac spheroids (CSs), produce enhanced mechanical energy under mechanical compression and work cooperatively via mechanical communication. For single CSs between parallel plates, compression increased both beating frequency and beating energy. Read More

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Orbital-angular-momentum-resolved diagnostics for tracking internal phase evolution in multi-bound solitons.

Opt Express 2021 May;29(11):16686-16694

The generation of multi-bound solitons is a fascinating subject of investigation in many conservative and dissipative systems, such as photonics, fluid mechanics, Bose-Einstein condensates, and so on. In this study, we demonstrate the successful extraction of phase dynamics between solitons in bound multiple solitons with up to seven constituents in a mode-locked Er laser system. By mapping the internal phase motions of multi-bound solitons to the spatial phase movement of cylindrical vector beams using orbital angular momentum (OAM)-based diagnostics, different categories of internal pulsations are revealed. Read More

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Spectral analysis of physiological brain pulsations affecting the BOLD signal.

Hum Brain Mapp 2021 Sep 26;42(13):4298-4313. Epub 2021 May 26.

Oulu Functional Neuro Imaging Group, Research Unit of Medical Imaging Physics and Technology (MIPT), University of Oulu, Oulu.

Physiological pulsations have been shown to affect the global blood oxygen level dependent (BOLD) signal in human brain. While these pulsations have previously been regarded as noise, recent studies show their potential as biomarkers of brain pathology. We used the extended 5 Hz spectral range of magnetic resonance encephalography (MREG) data to investigate spatial and frequency distributions of physiological BOLD signal sources. Read More

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September 2021

Pulmonary artery aneurysm diagnosed by dynamic digital chest radiography.

Ann Thorac Surg 2021 May 19. Epub 2021 May 19.

Department of Thoracic and Thyroid Surgery, Faculty of Medicine, Kyorin University.

Pulmonary artery aneurysms (PAAs) are rare, but clinically important because their rupture can cause sudden death. We present the first case of an asymptomatic patient with an unruptured PAA that was successfully diagnosed by dynamic digital chest radiography (DDCR) and was treated surgically. DDCR is a state-of-the-art temporally resolved radiographic technique that offers high-quality fluoroscopy-like images at a low radiation dose. Read More

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Relationship between Passive and Active Pulsations of Rat Artery as Vascular Extension of Frank-Starling Law.

Bull Exp Biol Med 2021 Apr 24;170(6):719-723. Epub 2021 Apr 24.

Department of Physiology, Research Institute of Experimental Cardiology, National Medical Research Center of Cardiology, Ministry of Health of the Russian Federation, Moscow, Russia.

The experiments on narcotized male rats (n=30) determined the parameters of passive and active pulsatile modes of isolated segment of femoral artery in situ. Rheographic elasticity (RE) and reactivity (RR) were correspondingly determined as the ratios of peak-to-peak (p2p) magnitudes of passive and active pulsatile oscillations of arterial electroimpedance (AEI) to p2p magnitude of BP undulations. The medians and interquartile ranges of RE and RR were 6 (3; 11) and 70 (40; 110) mΩ/mm Hg, respectively. Read More

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Sensorineural Hearing Loss Caused by Labyrinthine Erosion Due to a Cerebrospinal Fluid Diverticulum.

Otol Neurotol 2021 Sep;42(8):e1056-e1057

Division of Otolaryngology-Head and Neck Surgery, The George Washington University, Washington DC.

Objective: To present a case of progressive sensorineural hearing loss (SNHL) caused by labyrinthine erosion secondary to expanding geniculate ganglion cerebrospinal fluid (CSF) diverticulum extending along the path of the facial nerve.

Patient: Thirteen-year-old man with no past medical history or risk factors presented with unilateral progressive SNHL and no other otologic or neurologic symptoms.

Interventions: Audiological data as well as imaging studies including a magnetic resonance imaging (MRI) of the brain and internal auditory canal and a temporal bone computed tomography (CT) are presented. Read More

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September 2021

Buildup dynamics of a pulsating dissipative soliton in an all-normal-dispersion PM Yb-doped fiber laser with a NALM.

Opt Lett 2021 Apr;46(7):1612-1615

A pulsating soliton exists in various passively mode-locked fiber lasers. Versatile categories of pulsating solitons have been investigated in a steady regime. However, the formation dynamics of pulsating solitons have not been fully revealed. Read More

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Sinking bullet syndrome: A unique case of transhemispheric migration.

Clin Neurol Neurosurg 2021 May 20;204:106607. Epub 2021 Mar 20.

Division of Neurosurgery, SBH Health System, Bronx, NY, USA; CUNY School of Medicine, New York, NY, USA.

Background: Spontaneous migration of retained intracranial bullet fragments is an increasingly recognized phenomenon. However, such migration is usually limited in extent, since it occurs along the bullet tract or cerebrospinal fluid (CSF) spaces. Transhemispheric migration through an intact cerebral hemisphere has not been previously reported. Read More

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Spinal Syrinx Due to Lipiodol-Induced Arachnoiditis.

World Neurosurg 2021 05 16;149:64-66. Epub 2021 Feb 16.

Department of Neurosurgery, Ghent University Hospital, Belgium.

We present a case of a progressive symptomatic intramedullary cyst, diagnosed decades after Lipiodol injection. Lipiodol was originally administered intrathecally for the radiologic diagnosis of spinal masses. A link between the lesion and the history of Lipiodol injection was never suspected. Read More

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A review on imaging techniques and quantitative measurements for dynamic imaging of cerebral aneurysm pulsations.

Sci Rep 2021 01 26;11(1):2175. Epub 2021 Jan 26.

Department of Neurosurgery, Radboud UMC, Nijmegen, The Netherlands.

Measurement of intracranial aneurysm wall motion may refine the current rupture risk estimation. A golden standard for measuring aneurysm pulsation is lacking. The aim is to evaluate magnitudes of aneurysm pulsation as published in current literature. Read More

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January 2021

A Case of Severe Infant-to-Placenta Hemorrhage in Association with Prolonged Delayed Cord Clamping.

Am J Case Rep 2020 Nov 1;21:e925116. Epub 2020 Nov 1.

Department of Clinical Science, Intervention and Technology, Division of Pediatrics, Karolinska Institute, Stockholm, Sweden.

BACKGROUND Delayed cord clamping is a well-established and evidence-based clinical practice which has improved the outcomes of many infants. Because of the positive effects of delayed cord clamping, non-evidence-based practices, including delaying cord clamping for up to 1 h until complete non-severance of the placenta, are becoming more widespread. CASE REPORT A full-term infant, born vigorous and well at a hospital, was hypotonic and poorly perfused at 50 min of age. Read More

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November 2020

Solitary popliteal neurofibroma: an unusual encounter.

BMJ Case Rep 2020 Oct 29;13(10). Epub 2020 Oct 29.

General Surgery, All India Institute of Medical Sciences Bhubaneswar, Bhubaneswar, Odisha, India.

Diagnosing a popliteal fossa mass can be intriguing at times, and are not always Baker's cysts, as expected. We present an uncommon case of a young lady who presented with a palpable firm mass in the popliteal fossa with no neurological deficit or compromised distal pulsations. On surgical exploration, it was found to be a well defined, firm mass, closely abutting the neurovascular bundle, which on histopathological study revealed a solitary encapsulated neurofibroma. Read More

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October 2020

Delayed presentation of superficial femoral artery pseudoaneurysm 45 years following gunshot injury.

Indian J Thorac Cardiovasc Surg 2020 Sep 19;36(5):526-529. Epub 2020 Jun 19.

Cardio Thoracic Centre, Department of Cardiothoracic Surgery, All India Institute of Medical Sciences, CTVS Office, 7th Floor, New Delhi, India.

This case report is a description of an uncommon delayed presentation of penetrating trauma of lower limb with history of inciting event being 45 years ago, as there are only 4 such reported cases in the literature. A 65-year-old male presented with progressive enlargement of swelling over the anterior aspect of the right thigh with difficulty in walking due to mechanical effects and paraesthesia in the affected limb. Clinical signs of a large lump in the right anteromedial thigh with no pulsations were present. Read More

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September 2020

Acute ischemic stroke diagnosis using brain tissue pulsations.

J Neurol Sci 2020 Dec 3;419:117164. Epub 2020 Oct 3.

Department of Cardiovascular Sciences, University of Leicester, Leicester, UK; University Hospitals of Leicester NHS Trust, Leicester, UK; NIHR Leicester Biomedical Research Centre, University of Leicester, Leicester, UK. Electronic address:

Healthy brain tissue pulsates with the cardiac cycle, but whether brain tissue pulsations (BTPs) are impaired by tissue ischemia due to ischemic stroke is currently unclear. This study is the first to explore the clinical potential of measuring BTPs using ultrasound in acute ischemic stroke patients. BTPs were measured in 24 healthy volunteers (aged 52-82 years) and 14 acute ischemic stroke patients (aged 51-86 years) using a novel Transcranial Tissue Doppler (TCTD) method. Read More

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December 2020

May-Thurner Syndrome: A Neglected Cause of Unilateral Leg Swelling.

Open Access Emerg Med 2020 1;12:121-125. Epub 2020 May 1.

Emergency Department, Hamad Medical Corporation, Doha, Qatar.

May-Thurner syndrome (MTS) is a clinical condition characterized by the compression of the left iliac vein by the right iliac artery. This condition predisposes the patient to deep venous thrombosis (DVT). We present the case of a 30-year-old female who arrived at the emergency department of our facility with progressive left leg swelling for four weeks, with low-risk probability for DVT. Read More

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Megaloblastic anemia and bilateral disc edema: An enigma… Have we figured it out yet?

Taiwan J Ophthalmol 2020 Jan-Mar;10(1):71-75. Epub 2020 Mar 4.

Department of Ophthalmology, V.M.M.C and Safdarjung Hospital, New Delhi, India.

A 28-year-old male presented with insidious-onset, painless, progressive diminution of vision in both eyes. He denied any other ocular symptoms. On examination, visual acuity in both eyes was 6/60. Read More

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Use of hysteroscopy in diagnosis and follow-up of acquired uterine enhanced myometrial vascularity.

Fertil Steril 2020 02;113(2):460-462

Cleveland Clinic Foundation, Cleveland Ohio.

Objective: To describe the role of hysteroscopy in diagnosis and subsequent follow-up of uterine enhanced myometrial vascularity (EMV). Uterine EMV, previously known as arteriovenous malformation (AVM), is a rare but cannot-miss finding often associated with prior pregnancy or uterine surgery and is typically suspected when a vascular mass is found on ultrasound. Color Doppler imaging will demonstrate high-velocity, low-impedance flow, with more significant shunts demonstrating higher peak systolic velocity (PSV). Read More

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February 2020

Corneal pulsation and biomechanics during induced ocular pulse. An ex-vivo pilot study.

PLoS One 2020 13;15(2):e0228920. Epub 2020 Feb 13.

Department of Biomedical Engineering, Wrocław University of Science and Technology, Wrocław, Poland.

The purpose of this study was to ascertain the relationships between the amplitude of the corneal pulse (CP) signal and the parameters of corneal biomechanics during ex-vivo intraocular pressure (IOP) elevation experiments on porcine eyes with artificially induced ocular pulse cycles. Two experiments were carried out using porcine eyes. In the first one, a selected eye globe was subjected to three IOP levels (15, 30 and 45 mmHg), where changes in physical ocular pulse amplitude were controlled by infusion/withdrawal volumes (ΔV). Read More

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Endovascular management of life threatening bleeding from a radiation induced internal iliac artery branch pseudoaneurysm.

CVIR Endovasc 2019 Aug 27;2(1):30. Epub 2019 Aug 27.

Department of Radiology, Amita Saint Francis Hospital, Evanston, IL, 60202, USA.

Background: Among radiation induced arterial complications, stenoses and occlusions are commonly reported. Radiation induced pseudoaneurysms (PSA) and their management outcomes are rarely reported.

Case Presentation: A 48 year old male underwent low anterior resection surgery for a clinically staged T2N0M0 rectal adenocarcinoma and adjuvant chemoradiation for the findings of lymphovascular invasion and focally positive distal margin 2 years prior to current admission. Read More

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Engineering of functional cardiac tubes by stepwise transplantation of cardiac cell sheets onto intestinal mesentery.

Heart Vessels 2020 Jun 2;35(6):859-867. Epub 2020 Jan 2.

Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan.

Implantable organ-like grafts made using tissue engineering techniques could potentially be used as circulatory assist devices in people with heart failure. The aims of this study were to engineer implantable, thick cardiac tubes by the stepwise transplantation of cardiac cell sheets onto intestinal mesentery and confirm that these cardiac tubes exhibited pulsatile activity and generated an internal pressure. Cell sheets were created by culturing neonatal rat cardiac cells on temperature-responsive dishes. Read More

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Symptomatic psychosis risk and physiological fluctuation in functional MRI data.

Schizophr Res 2020 02 4;216:339-346. Epub 2019 Dec 4.

Research Unit of Clinical Neuroscience, Department of Psychiatry, University of Oulu, Finland; Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland; Department of Psychiatry, Oulu University Hospital, Oulu, Finland. Electronic address:

Background: Physiological brain pulsations have been shown to play a critical role in maintaining interstitial homeostasis in the glymphatic brain clearance mechanism. We investigated whether psychotic symptomatology is related to the physiological variation of the human brain using fMRI.

Methods: The participants (N = 277) were from the Northern Finland Birth Cohort 1986. Read More

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February 2020

DIAGNOSTIC CHALLENGES IN NECROTIC UVEAL MELANOMA.

Retin Cases Brief Rep 2019 Aug 13. Epub 2019 Aug 13.

Ocular Oncology Service, Wills Eye Hospital, Thomas Jefferson University, Philadelphia, Pennsylvania.

Purpose: To describe a case of ciliochoroidal melanoma with massive spontaneous hemorrhagic retinal and choroidal detachment that presented a diagnostic challenge because of poor fundus visualization and atypical imaging features.

Methods: Case report.

Results: A 71-year-old white man on apixaban for atrial fibrillation presented with sudden onset of pain and vision loss in the left eye. Read More

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Impaired Glymphatic Transport in Spontaneously Hypertensive Rats.

J Neurosci 2019 08 17;39(32):6365-6377. Epub 2019 Jun 17.

Center for Translational Neuromedicine, University of Copenhagen, Copenhagen N, Denmark, 2200,

The glymphatic system is a brainwide CSF transport system that uses the perivascular space for fast inflow of CSF. Arterial pulsations are a major driver of glymphatic CSF inflow, and hypertension that causes vascular pathologies, such as arterial stiffening and perivascular alterations, may impede the inflow. We used dynamic contrast-enhanced MRI to assess the effect of hypertension on glymphatic transport kinetics in male young and adult spontaneously hypertensive (SHR) rats compared with age-matched normotensive Wistar-Kyoto rats (WKY). Read More

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Use of tube cystostomy in the surgical management of obstructive urolithiasis in a Bactrian camel.

J Am Vet Med Assoc 2019 Apr;254(7):868-873

Case Description: A 6-year-old castrated male Bactrian camel was evaluated because of a 14hour history of oliguria and stranguria that progressed to anuria.

Clinical Findings: Perineal urethral pulsations and intermittent tail flagging with no accompanying urination were observed. Ultrasonography of the urethra revealed multiple hyperechoic foci with shadowing artifact indicative of calculi present in the penile urethra distal to the sigmoid flexure. Read More

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Adult-onset giant cervical cystic hygroma with pressure manifestations on aerodigestive tract, managed surgically: reporting of a rare case.

Ann R Coll Surg Engl 2019 Mar 3;101(3):e84-e87. Epub 2019 Jan 3.

Department of General Surgery, King Fahd Central Hospital , Jazan , Saudi Arabia.

Cystic hygroma is a benign congenital malformation of the lymphatic system that occurs in children younger than two years of age. Hygroma commonly presents in head and neck but can be present anywhere. It is rarely seen in adults. Read More

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Prehospital Invasive Arterial Pressure: Use of a Minimized Flush System.

Prehosp Disaster Med 2018 Oct 31;33(5):490-494. Epub 2018 Aug 31.

1Department of Anaesthesia and Intensive Care,Södersjukhuset,Stockholm,Sweden.

IntroductionInvasive blood pressure (IBP) monitoring could be of benefit for certain prehospital patient groups such as trauma and cardiac arrest patients. However, there are disadvantages with using conventional IBP devices. These include time to prepare the transducer kit and flush system as well as the addition of long tubing connected to the patient. Read More

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October 2018

Orbital arteriovenous fistula presenting with choroidal pulsations on optical coherence tomography.

Am J Ophthalmol Case Rep 2018 Dec 19;12:36-38. Epub 2018 Aug 19.

Duke University Eye Center, Durham, NC, USA.

Purpose: To describe a case of orbital arteriovenous fistula diagnosed based on choroidal pulsations on optical coherence tomography (OCT).

Observations: A 69-year-old female originally referred for evaluation of macular degeneration. During acquisition of OCT images, choroidal pulsations of the right eye were noted on the B-scan on the instrument display. Read More

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December 2018

Median arcuate ligament syndrome and arterial anastomotic bleeding inducing hepatic artery thrombosis after liver transplantation: A case report.

Medicine (Baltimore) 2018 Jun;97(25):e10947

Department of Hepatobiliary & Pancreas Surgery, The First Hospital, Jilin University, Changchun, China.

Rationale: Median arcuate ligament (MAL) may compress the coeliac trunk inducing median arcuate ligament syndrome (MALS). MALS is a risk factor for hepatic artery thrombosis (HAT) in liver transplant recipients.

Patient Concerns: A thin female complained about upper abdominal pain for two months. Read More

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Orbital Meningoencephalocele and Pulsatile Proptosis: A Rare Entity.

Cureus 2018 Jan 15;10(1):e2064. Epub 2018 Jan 15.

Liaquat National Hospital & Medical College.

Orbital roof defects are rare congenital osseous abnormalities that cause protrusion of intracranial contents into the orbit, resulting in a condition known as the orbital meningoencephalocele, a rare cause of pulsatile proptosis. We present a case of a 25-year-old lady, presented to us with complaints of left frontal headache, left eye protrusion and double vision from the left eye for the past three months. Her higher mental functions were intact. Read More

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January 2018