179 results match your criteria Pacemaker-Mediated Tachycardia


Unexpected and undesired side-effects of pacing algorithms during exercise.

J Electrocardiol 2018 Nov - Dec;51(6):1023-1028. Epub 2018 Aug 17.

IHU Liryc, Electrophysiology and Heart Modeling Institute, fondation Bordeaux Université, F-33600 Pessac-Bordeaux, France; Bordeaux University Hospital (CHU), Cardio-Thoracic Unit, F-33600 Pessac, France.

While the implantable pacemaker has initially been developed to treat symptomatic bradycardia, we demand of modern devices that they also function properly during exercise. In recent years, device manufacturers have implemented multiple proprietary algorithms which aim to improve pacemaker function by avoiding unnecessary right ventricular pacing, optimizing atrial refractory periods and diagnosing pacemaker mediated tachycardia. When activated, these algorithms may save the associated EGM into the device memory which enables later analysis by remote monitoring or device interrogation. Read More

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August 2018
1 Read

The limitations and potential adverse effects of the premature ventricular contraction response.

J Arrhythm 2018 Oct 22;34(5):572-575. Epub 2018 Jun 22.

Division of Cardiovascular Medicine Department of Internal Medicine Kobe University Graduate School of Medicine Kobe Japan.

A 69-year-old man, who had undergone surgery for mitral and tricuspid regurgitation with the Maze procedure for paroxysmal atrial fibrillation, was admitted with an episode of syncope due to sick sinus syndrome. Three days after implantation of a dual-chamber pacemaker (Accent MRI™, St. Jude Medical Inc. Read More

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October 2018
1 Read

Pacemaker-mediated arrhythmias.

J Arrhythm 2018 Oct 3;34(5):485-492. Epub 2018 Aug 3.

Cardiac Rhythm Management Department MonashHeart Monash Medical Centre Melbourne Australia.

Pacemakers can be directly involved in initiating or sustaining different forms of arrhythmia. These can cause symptoms such as dyspnea, palpitations, and decompensated heart failure. Early detection of these arrhythmias and optimal pacemaker programming is pivotal. Read More

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October 2018
3 Reads

Pacemaker-mediated tachycardia: What is the mechanism?

Pacing Clin Electrophysiol 2018 Nov 19;41(11):1549-1551. Epub 2018 Sep 19.

First Department of Cardiology, Interventional Electrocardiology and Hypertension, Medical College, Jagiellonian University, Krakow, Poland.

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November 2018
1 Read

Pacemaker-mediated tachycardia in the absence of retrograde ventriculoatrial conduction: What is the mechanism?

J Cardiovasc Electrophysiol 2018 Dec 25;29(12):1721-1723. Epub 2018 Sep 25.

Arrhythmia Unit, Cardiology Department, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.

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December 2018
15 Reads

Safety and Feasibility of a Nocturnal Heart Rate Elevation-Exploration of a Novel Treatment Concept.

J Card Fail 2018 Jul 17. Epub 2018 Jul 17.

Department of Medicine, Cardiology Division, Larner College of Medicine at the University of Vermont, Burlington, Vermont. Electronic address:

Background: Diastolic dysfunction and heart failure with preserved ejection fraction (HFpEF) are associated with myocardial fibrosis and concentric left ventricular hypertrophy (LVH). In a preclinical model of LVH, we demonstrated that a moderate increase in heart rate can reduce interstitial fibrosis and improve LV compliance. We therefore hypothesized that moderately elevated heart rates can be used to beneficially modify the myocardial substrate in patients with diastolic dysfunction and HFpEF. Read More

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July 2018
1 Read

Typical atrial flutter mimicking a pacemaker-mediated tachycardia.

J Arrhythm 2018 Jun 22;34(3):309-311. Epub 2018 May 22.

Division of Cardiovascular Disease University of Alabama at Birmingham Birmingham Alabama USA.

A 64-year-old man with a history of congestive heart failure secondary to nonischemic cardiomyopathy, mitral and aortic valve replacements, and biventricular cardioverter-defibrillator placement, developed a tachycardia. The tachycardia exhibited a biventricular paced rhythm with a short R-P interval and concentric atrial activation sequence within the coronary sinus, suggesting that the tachycardia might be a pacemaker-mediated tachycardia (PMT). However, the tachycardia was diagnosed as counterclockwise cavotricuspid isthmus (CTI)-dependent atrial flutter (AFL), and linear ablation of the CTI eliminated the tachycardia. Read More

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June 2018
10 Reads

Pacemaker-mediated tachycardia with narrow QRS complexes.

Clin Case Rep 2018 Jun 14;6(6):1040-1044. Epub 2018 Apr 14.

Division of Cardiology Hospital Ramos Mejia Buenos Aires Argentina.

Inverted connection of the atrial and ventricular leads is an unusual circumstance during the implantation of a dual-chamber pacemaker. Yet, PMT may present in the absence of complex mechanisms. The detection and termination algorithms used by the device proved to be efficient for the adequate diagnosis and treatment. Read More

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June 2018
9 Reads

Pin-port misconnection induced endless loop tachycardia.

J Arrhythm 2018 04 9;34(2):213-215. Epub 2018 Mar 9.

Department of Cardiology Turkiye Yuksek Ihtisas Training and Research Hospital Health Sciences University Ankara Turkey.

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April 2018
2 Reads

Ventriculoatrial synchrony induced heart failure.

Acta Clin Belg 2018 Dec 21;73(6):439-443. Epub 2018 Feb 21.

a Faculty of Medicine , University of Novi Sad , Novi Sad , Serbia.

Objective And Importance: Endless loop tachycardia or pacemaker-mediated tachycardia, and atrioventricular desynchronization arrhythmia or repetitive non-reentrant ventriculoatrial synchrony (RNRVAS) are two forms of reverse impulse conduction - ventriculoatrial (VA) synchrony. Although VA synchrony can theoretically cause aggravation of heart failure, clinical cases describing severe consequential heart failure are lacking.

Clinical Presentation And Intervention: We describe a case of a 60-year-old patient who underwent primary percutaneous coronary intervention and mitral valve surgery. Read More

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December 2018
6 Reads

Desynchronization in a cardiac resynchronization device induced by a pacemaker-mediated tachycardia algorithm.

Indian Pacing Electrophysiol J 2018 May - Jun;18(3):108-111. Epub 2018 Jan 5.

Biotronik, Berlin, Germany.

This report describes the occurrence of desynchronization in a patient with a cardiac resynchronization device programmed with an active pacemaker-mediated tachycardia algorithm based on AV delay modification. Desynchronization was precipitated by sinus tachycardia and the abrupt return of the prevailing AV delay that followed the periodic prolongation of the AV delay mandated by activity of the algorithm. Prevention of desynchronization in this setting requires programming a right ventricular upper rate interval longer than the sum of the programmed ventriculoatrial interval and the AV delay. Read More

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January 2018
7 Reads

Pacemaker-Mediated Programmable Hypertension Control Therapy.

J Am Heart Assoc 2017 Dec 23;6(12). Epub 2017 Dec 23.

Asklepios Klinik St. Georg, Hamburg, Germany.

Background: Many patients requiring a pacemaker have persistent hypertension with systolic blood pressures above recommended levels. We evaluated a pacemaker-based Programmable Hypertension Control (PHC) therapy that uses a sequence of variably timed shorter and longer atrioventricular intervals.

Methods And Results: Patients indicated for dual-chamber pacing with office systolic blood pressure (oSBP) >150 mm Hg despite stable medical therapy were implanted with a Moderato™ pulse generator that delivers PHC therapy. Read More

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December 2017
16 Reads

P Wave and the Substrates of Arrhythmias Originating in the Atria.

Card Electrophysiol Clin 2017 09;9(3):365-382

Heart and Vessels Department, University of Florence, Largo Brambilla, 3, 50134 Florence, Italy; IRCCS Multimedica, Cardiology Department, Via Milanese, 300, 20099 Sesto San Giovanni, Italy.

The sinus node is the primary cardiac pacemaker from which the wavefront of activation proceeds through bundles of atrial fibers to the atrioventricular node. Left atrial activation proceeds along the Bachmann bundle and lower right atrium, determining P-wave morphology. Electrocardiogram reveals ectopic or retrograde atrial activation, wandering pacemaker activity, or artificial pacemaker-mediated atrial depolarization. Read More

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September 2017
2 Reads

Ventricular fibrillation triggered by a pacemaker-mediated tachycardia protection algorithm.

Europace 2017 Aug;19(8):1342

CHU Rennes, Service de Cardiologie et Maladies Vasculaires, Rennes, F-35000, France.

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August 2017
15 Reads

SafeR and escape junctional rhythm: A singular trigger for pacemaker-mediated tachycardia.

J Electrocardiol 2017 Jul - Aug;50(4):504-506. Epub 2017 Feb 20.

Cardiology Unit, Department of Clinical and Experimental Medicine, University of Messina.

A 70-year-old man, who previously received a dual chamber pacemaker for paroxysmal AV block (Sorin Symphony DR 2550), was noted on telemetry to have multiple episodes of rapid ventricular pacing at approximately 120bpm. Evaluation of the telemetry strips revealed that all of the rapid ventricular pacing episodes were initiated by brief runs of escape junctional rhythm. Programmed bradycardia parameters were AAI SafeR with lower rate limit of 50bpm. Read More

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May 2018
3 Reads

Total thoracoscopic left ventricular lead implantation for hybrid cardiac resynchronization therapy in pacemaker-mediated cardiomyopathy.

Gen Thorac Cardiovasc Surg 2017 Oct 28;65(10):598-601. Epub 2017 Feb 28.

Cardiovascular Surgery, Keio University, Minato, Japan.

Cardiac resynchronization therapy (CRT) has been increasingly performed in patients having heart failure with dyssynchrony. We report a successful case of total thoracoscopic left ventricular (LV) lead implantation in CRT. A 77-year-old man with marked dyssynchrony of the LV wall motion and a low ejection fraction (EF17%) due to pacemaker-mediated cardiomyopathy was referred to us. Read More

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October 2017
4 Reads

Accuracy of the pacemaker-mediated tachycardia algorithm in Boston Scientific devices.

J Electrocardiol 2016 Jul-Aug;49(4):522-9. Epub 2016 Apr 22.

Haut-Lévêque Hospital, Centre, Hospitalier Universitaire de Bordeaux; LIRYC institute, Pessac, France.

Introduction: The incidence of pacemaker-mediated tachycardia (PMT) varies as a function of patient characteristics, device programming and algorithm specificities. We investigated the efficacy of the Boston Scientific algorithm by reviewing PMT episodes in a large device population.

Methods: In this multicenter study, we included 328 patients implanted with a Boston Scientific device: 157 non-dependent patients with RYTHMIQ™ activated (RYTHMIQ group), 76 patients with permanent AV-conduction disorder (AV-block group) and 95 Cardiac Resynchronization Therapy patients (CRT group). Read More

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November 2017
6 Reads

Validation of device algorithm to differentiate pacemaker-mediated tachycardia from tachycardia due to atrial tracking.

Heart Rhythm 2016 08 19;13(8):1612-7. Epub 2016 Apr 19.

Department of Medicine, Division of Cardiology, Cornell University Medical Center, New York, New York.

Background: Current cardiac devices cannot always differentiate between pacemaker-mediated tachycardia (PMT) and tracking of sinus or atrial tachycardia. We previously derived a novel algorithm for distinguishing the 2 mechanisms based on the specific termination response to postventricular atrial refractory period extension, atrial rates, and changes in atrial electrogram morphology.

Objective: The purpose of this study was to evaluate how this algorithm would have performed in a clinical setting based on previously recorded PMT events. Read More

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August 2016
5 Reads

Repetitive nonreentrant ventriculoatrial synchrony: An underrecognized cause of pacemaker-related arrhythmia.

Heart Rhythm 2016 08 2;13(8):1739-47. Epub 2016 Apr 2.

Hunter Holmes McGuire Veterans Affairs Medical Center, Richmond, Virginia. Electronic address:

Similar to endless loop tachycardia (ELT), repetitive nonreentrant ventriculoatrial synchrony (RNRVAS) is a ventriculoatrial (VA) synchrony pacemaker-mediated arrhythmia. RNRVAS was first described in 1990 and can only occur in the presence of retrograde VA conduction and dual-chamber or cardiac resynchronization devices with tracking (P-synchronous ventricular pacing such as DDD, DDDR) or nontracking pacing modes that allow AV-sequential pacing (DDI, DDIR). RNRVAS is promoted by (1) high lower rate limit or any feature that allows rapid pacing, (2) long AV intervals, or (3) long postventricular atrial refractory period (PVARP). Read More

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August 2016
34 Reads
1 Citation
5.080 Impact Factor

Tracking preference as unusual trigger of pacemaker-mediated tachycardia in a resynchronization device.

J Electrocardiol 2016 Jul-Aug;49(4):509-11. Epub 2016 Mar 11.

Department of Clinical and Experimental Medicine, University of Messina.

A 59-year-old woman with a history of congestive heart failure, who previously received a biventricular cardioverter-defibrillator was admitted with dyspnea and peripheral edema. She was noted on telemetry to have multiple self-terminated episodes of rapid ventricular pacing, consistent with pacemaker-mediated tachycardia. All episodes started after three consecutive ventricular extrasystoles. Read More

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November 2017
3 Reads

Performance of a specific algorithm to minimize right ventricular pacing: A multicenter study.

Heart Rhythm 2016 06 17;13(6):1266-73. Epub 2016 Feb 17.

Haut-Lévêque Hospital, Centre Hospitalier Universitaire de Bordeaux; LIRYC institute, Pessac, France.

Background: In Boston Scientific dual-chamber devices, the RYTHMIQ algorithm aims to minimize right ventricular pacing.

Objective: We evaluated the performance of this algorithm determining (1) the appropriateness of the switch from the AAI(R) mode with backup VVI pacing to the DDD(R) mode in case of suspected loss of atrioventricular (AV) conduction and (2) the rate of recorded pacemaker-mediated tachycardia (PMT) when AV hysteresis searches for restored AV conduction.

Methods: In this multicenter study, we included 157 patients with a Boston Scientific dual-chamber device (40 pacemakers and 117 implantable cardioverter-defibrillators) without permanent AV conduction disorder and with the RYTHMIQ algorithm activated. Read More

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June 2016
39 Reads
5.080 Impact Factor

A Novel Algorithm for Pacemaker-Mediated Tachycardia: Wrong Diagnosis, Right Therapy.

Pacing Clin Electrophysiol 2016 Mar 30;39(3):302-4. Epub 2015 Oct 30.

Department of Medicine, Division of Cardiology, Cornell University Medical Center, New York, New York.

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March 2016
6 Reads

Pacemaker-Mediated Tachycardia: Manufacturer Specifics and Spectrum of Cases.

Pacing Clin Electrophysiol 2015 Dec 5;38(12):1489-98. Epub 2015 Nov 5.

Hôpital Cardiologique du Haut-Lévêque, CHU Bordeaux, L'institut de rythmologie et modélisation cardiaque (LIRYC), Université Bordeaux, Bordeaux, France.

Pacemaker-mediated tachycardia (PMT) is the term used to describe a repetitive sequence of sensed retrograde P waves followed by ventricular pacing at or below the maximum tracking rate. The following events can promote atrioventricular (AV) dissociation, retrograde conduction, and the onset of PMT: ventricular or atrial extrasystole, an excessively long programmed AV delay, external interference or myopotentials sensed by the atrial channel, atrial sensing or pacing failure, the absence of postventricular atrial refractory period extension after removal of a magnet, and VDD pacing at a higher rate than sinus rate. In contemporary devices, each manufacturer has a proprietary algorithm to detect and terminate PMT. Read More

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December 2015
3 Reads

Pacemaker-mediated tachycardia in an unconventional resynchronization device.

Europace 2015 Sep 11;17(9):1453. Epub 2015 Jun 11.

Department of Cardiovascular Medicine, University of Zagreb School of Medicine and University Hospital Centre Zagreb, Kišpatićeva 12, Zagreb 10000, Croatia.

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September 2015
6 Reads

Uncommon presentation of drug-refractory pacemaker-mediated common atrioventricular nodal reentrant tachycardia and a simple solution by reprogramming.

Intern Med 2015 1;54(9):1063-6. Epub 2015 May 1.

Division of Cardiology, Cardiovascular Center, Sendai Kousei Hospital, Japan.

An 81-year-old woman who had undergone dual chamber pacemaker implantation for sick sinus syndrome was referred to our hospital with drug-refractory common atrioventricular (AV) nodal reentrant tachycardia. Ventricular pacing (Vp) following premature atrial contraction (PAC) with a long AV interval induced ventriculoatrial (VA) conduction, which allowed the tachycardia to be initiated. The sensed AV interval was shortened to 80 ms, allowing Vp during the refractory period of VA conduction. Read More

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September 2015
6 Reads

Intermittent Irregular Pacemaker-Mediated Tachycardia.

Pacing Clin Electrophysiol 2015 Sep 5;38(9):1117-20. Epub 2015 Feb 5.

University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital Birmingham, Edgbaston, Birmingham, UK.

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September 2015
3 Reads

The role of biventricular pacing in the prevention and therapy of pacemaker-induced cardiomyopathy.

Ann Noninvasive Electrocardiol 2015 May 6;20(3):224-39. Epub 2015 Jan 6.

University of Rochester School of Medicine and Dentistry, Rochester, NY.

Right ventricular (RV) pacing produces well-known long-term deleterious effects not only on already compromised, but also on the normal left ventricle (LV). The activation pattern mimicks that of left bundle branch block, with delayed activation of the LV free wall, and results in electrical and mechanical dyssynchrony. Long-term mandatory (100%) RV pacing, increases LV dimensions and decreases the ejection fraction. Read More

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May 2015
2 Reads

Interventricular Pacemaker-Mediated Tachycardia during Biventricular Pacing.

Pacing Clin Electrophysiol 2015 May 4;38(5):645-50. Epub 2014 May 4.

Florida Heart Rhythm Institute, Tampa, Florida.

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May 2015
3 Reads

Newer algorithms in bradycardia management.

Cardiol Clin 2014 May 15;32(2):283-92. Epub 2014 Feb 15.

Division of Internal Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9047, USA; Division of Cardiology, Veterans Health Administration (VA) North Texas Healthcare System, 4500 South Lancaster Road, Dallas, TX 75216, USA.

Permanent cardiac pacemakers (PPM) are effective in the treatment of bradycardia in a growing number of clinical scenarios. An appreciation of the capacity of PPMs to result in negative hemodynamic and proarrhythmic effects has grown alongside clinical experience with permanent pacing. Such experience has necessitated the development of algorithms aimed at optimizing device functionality across a broad spectrum of physiologic and pathologic conditions. Read More

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May 2014
4 Reads

Pacemaker-mediated angina.

Exp Clin Cardiol 2013 ;18(1):35-7

Department of Cardiology, University of South Alabama, Mobile, Alabama, USA.

Angina is a clinical syndrome characterized by discomfort in the chest, jaw, shoulder, back or arm. It is typically aggravated by exertion or emotional stress and relieved by nitroglycerin. Atherosclerotic coronary artery disease is the most common cause of angina. Read More

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December 2013
10 Reads

An unusual form of "pacemaker mediated tachycardia".

Heart Rhythm 2014 Feb 1;11(2):328-9. Epub 2013 Nov 1.

Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center Los Angeles, California.

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February 2014
5 Reads

An uncommon cause of pacemaker-mediated ventricular tachycardia.

Authors:
Daniel P Morin

J Cardiovasc Electrophysiol 2014 Jan 17;25(1):107-9. Epub 2013 Sep 17.

Ochsner Medical Center, Ochsner Clinical School, Queensland University School of Medicine, New Orleans, Louisiana, USA.

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January 2014
3 Reads

[Wide QRS tachycardia preceded by pacemaker spikes].

Semergen 2014 Apr 13;40(3):e57-9. Epub 2013 Jun 13.

Servicio de Urgencias, Hospital de Alta Resolución de Écija, Écija, Sevilla, España.

The differential diagnosis and therapeutic management of wide QRS tachycardia preceded by pacemaker spike is presented. The pacemaker-mediated tachycardia, tachycardia fibrillo-flutter in patients with pacemakers, and runaway pacemakers, have a similar surface electrocardiogram, but respond to different therapeutic measures. The tachycardia response to the application of a magnet over the pacemaker could help in the differential diagnosis, and in some cases will be therapeutic, as in the case of a tachycardia-mediated pacemaker. Read More

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April 2014
3 Reads

When a search causes back-firing.

Pacing Clin Electrophysiol 2014 Jan 21;37(1):109-12. Epub 2013 May 21.

Heart Rhythm Service, University Hospital of Wales, Cardiff, UK.

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January 2014
3 Reads

Ventriculoatrial conduction and related pacemaker-mediated arrhythmias in patients implanted for atrioventricular block: an old problem revisited.

Int J Cardiol 2013 Oct 29;168(4):3300-8. Epub 2013 Apr 29.

Department of Electrophysiology, Heart Center, University of Leipzig, Leipzig, Germany. Electronic address:

Introduction: Ventriculoatrial (VA) conduction and related pacemaker-mediated tachyarrhythmias (PMT) have not been systematically investigated in a large cohort of patients implanted for symptomatic atrioventricular (AV) block.

Methods And Results: Two hundred fifty consecutive patients (71±14 years, 63% male) implanted for symptomatic second- or third-degree AV block were screened for retrograde VA conduction and related PMTs including endless loop tachycardia (ELT) and repetitive nonreentrant VA synchrony (RNRVAS). After a mean post-implantation period of 38±12 months, AV block was persistent in 137 (55%) and variable in 113 (45%) patients. Read More

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October 2013
16 Reads

Case report: Perioperative pacemaker-mediated tachycardia in the patient with a dual chamber implantable cardioverter-defibrillator.

Anesth Analg 2013 Feb 24;116(2):307-10. Epub 2012 Dec 24.

Department of Anesthesiology, Stony Brook University Medical Center, HSC L-4, Room 060, Stony Brook, NY 11794, USA.

Patients with cardiac implantable electronic devices are at additional risk for arrhythmias while undergoing surgical procedures. In this case report, we present a patient with a dual chamber implantable cardioverter-defibrillator who developed intraoperative pacemaker-mediated tachycardia causing significant hemodynamic instability. Management of this arrhythmia can be particularly challenging, because standard application of a magnet does not affect the pacing functions of an implantable cardioverter-defibrillator. Read More

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February 2013
5 Reads

Device diagnosis of pacemaker-mediated tachycardia: true or false?

Pacing Clin Electrophysiol 2013 Jan 21;36(1):116-8. Epub 2012 Jul 21.

Florida Heart Rhythm Institute, Tampa, FL 33606, USA.

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January 2013
4 Reads

Atrial lead malfunction presenting as new onset pacemaker-mediated tachycardia.

Europace 2012 Jul 26;14(7):1060-1. Epub 2012 Jan 26.

The Florida Heart Rhythm Institute, Tampa, FL, USA.

This report describes the de novo occurrence of pacemaker-mediated tachycardia (PMT) in a patient with a dual-chamber implantable cardioverter-defibrillator and stable retrograde ventriculoatrial conduction time. The same rate-adaptive post-ventricular atrial refractory period (PVARP) duration had previously prevented PMT. Oversensing of atrial false signals from a defective lead shortened the PVARP with consequent sensing of retrograde conduction. Read More

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July 2012
3 Reads

Pacemaker-mediated tachycardia initiated by an atrioventricular search algorithm to minimize right ventricular pacing.

J Electrocardiol 2012 May-Jun;45(3):336-9. Epub 2012 Jan 26.

Florida Heart Rhythm Institute, Tampa, FL, USA.

We report the initiation of pacemaker-mediated tachycardia by a St Jude implantable cardioverter-defibrillator with a programmed Ventricular Intrinsic Preference algorithm used for minimizing or inhibiting right ventricular pacing. This feature prolongs the atrioventricular (AV) delay periodically to determine if ventricular sensed events follow atrial events. Retrograde ventriculoatrial conduction and pacemaker-mediated tachycardia were initiated by long extended AV delays of 300 and 400 milliseconds. Read More

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August 2012
5 Reads

Catheter ablation of accessory pathway in the treatment of pacemaker-mediated tachycardia.

Pacing Clin Electrophysiol 2012 Apr 28;35(4):e84-6. Epub 2011 Sep 28.

Electrophysiology Division, National Medical Center 20 de Noviembre, ISSSTE, Mexico D.F.

Pacemaker-mediated tachycardia (PMT) remains a clinical problem in patients with dual-chamber pacemaker despite technological advances. The onset mechanism of this tachycardia is sensing of retrograde atrial activation after ventricular stimulation. Repeated retrograde conduction perpetuates tachycardia. Read More

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April 2012
4 Reads

Common pitfalls in interpreting pacemaker electrocardiograms in the emergency department.

J Electrocardiol 2011 Nov-Dec;44(6):616-21. Epub 2011 Sep 9.

Mayo Clinic Jacksonville Florida, Division of Cardiology, Jacksonville, FL, USA.

The number of patients receiving pacemakers and defibrillators has grown substantially over the last 20 years. In addition, the complexity and sophistication of these devices have increased, making diagnosis of pacemaker problems using the electrocardiogram (ECG) more difficult for clinicians in the emergency department. This article will focus on a few of the pitfalls to be avoided when interpreting paced ECGs. Read More

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February 2012
3 Reads

Differentiating pacemaker-mediated tachycardia from tachycardia due to atrial tracking: utility of V-A-A-V versus V-A-V response after postventricular atrial refractory period extension.

Heart Rhythm 2011 Aug 3;8(8):1185-91. Epub 2011 Mar 3.

Department of Medicine, Division of Cardiology, Cornell University Medical Center, New York, New York, USA.

Background: Dual-chamber pacemaker systems can lead to two forms of pacemaker-facilitated tachycardia: pacemaker-mediated tachycardia (PMT) and tracking of sinus or atrial tachycardia. Current pacemaker algorithms cannot always differentiate between these two tachycardias.

Objective: The purpose of this study was to investigate a novel algorithm for distinguishing the two mechanisms of pacemaker-facilitated tachycardia, which is based on the specific termination response to postventricular atrial refractory period (PVARP) extension. Read More

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August 2011
6 Reads

Atypical pacemaker-mediated tachycardia from the atrial channel: what is the mechanism?

Heart Rhythm 2011 Apr 27;8(4):636-8. Epub 2010 Dec 27.

Cardiology Division, Hospital Universitari Germans Trias i Pujol, Badalona, Spain.

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April 2011
4 Reads

Single-chamber, rate-responsive pacemaker-mediated tachycardia.

Can J Cardiol 2010 Nov;26(9):e340

Department of Cardiology, State Medical Center, Budapest, Hungary.

The case of a patient with a unipolar VVIR, who developed a sensor-driven increased pacing rate at rest following pulse generator replacement, is presented. The cause was pectoral muscle stimulation, which triggered a sensor-driven rate response in the supine position. The possible causes and management are discussed. Read More

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November 2010
5 Reads

Atypical initiation of endless-loop, pacemaker-mediated tachycardia.

Pacing Clin Electrophysiol 2011 May 14;34(5):617-20. Epub 2010 Oct 14.

Cardiovascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania 15213, USA.

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May 2011
3 Reads

Pacemaker-mediated bigeminy: what is the mechanism?

Pacing Clin Electrophysiol 2011 Mar 17;34(3):380-3. Epub 2010 Aug 17.

I Department of Cardiology and Hypertension, University Hospital, Kracow, Poland.

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March 2011
2 Reads

Pacemaker-mediated tachycardia over the upper rate limit in a biventricular pacemaker system: what is the mechanism?

Pacing Clin Electrophysiol 2010 Nov;33(11):1421-4

Institute of Cardiology, University of Debrecen, Debrecen, Hungary.

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November 2010
8 Reads

Pacemaker-mediated tachycardia.

Authors:
W Ullah A Stewart

Heart 2010 Jul 28;96(13):1062. Epub 2010 May 28.

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July 2010
3 Reads

Repetitive Nonreentrant Ventriculoatrial Synchrony (RNRVAS).

Authors:
Johnson Francis

Indian Pacing Electrophysiol J 2010 May 5;10(5):203-4. Epub 2010 May 5.

Malabar Institute of Medical Sciences, Calicut, Kerala, India.

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May 2010
72 Reads