Bifocal Demand Pacing

Castillo, Cesar A.; Berkovits, Barouh V.; Castellanos, Agustín; Lemberg, L; Callard, George M.; Jude, James R.

doi:10.1378/chest.59.4.360

Cited by 63 publications

(7 citation statements)

References 11 publications

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“…45 This pacemaker involves the use of two electrodes, one positioned in the right atrium and one in the right ventricle, with both atrial and ventricular pacing circuits. The ventricular electrode senses the ventricular electrocardiogram and sequentially paces the atrium and ventricle on demand.…”

mentioning

confidence: 99%

Clinical Spectrum of the Sick Sinus Syndrome

et al. 1972

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mentioning

confidence: 99%

Clinical Spectrum of the Sick Sinus Syndrome

et al. 1972

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“…4), a ventricular rather than atrial pacemaker is indicated. Recently an ingenious ventricular‐inhibited “bifocal” pacemaker has been introduced (14) for use in patients with sinus bradycardia with or without A‐V block. The pacemaker involves the use of two electrodes, one in the right atrium and one in the right ventricle, with both atrial and ventricular pacing circuits.…”

Section: Atrial Pacingmentioning

confidence: 99%

Cardiac Pacing — The State of the Art*

Cheng

1972

J American Geriatrics Society

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The best method for cardiac pacing is transvenous. The percutaneous transfemoral approach has gained increasing popularity, especially when the objective is to obtain a His‐bundle recording. Although most of the clinical experience on cardiac pacing in the past decade has been with ventricular pacemakers, atrial pacing is becoming an increasingly important clinical tool. Among its many diagnostic, prognostic and therapeutic applications are: stress test for angina, diagnosis of the Wolff‐Parkinson‐White syndrome, recognition of bilateral bundle‐branch block, differentiation between mitral valvular obstruction and left ventricular dysfunction in rheumatic heart disease, selection of the pacing site in the sick sinus syndrome, and safe termination of supraventricular tachycardias in overdigitalized patients. The extensive use of cardiac pacemakers has also resulted in a new spectrum of auscultatory phenomena. Their occurrence depends upon the mode and site of pacing, the nature of the supraventricular rhythm, and the production of extra sounds and murmurs by the pacing catheters. An understanding of these phenomena is useful for proper clinical evaluation of pacemaker function as well as the underlying cardiac dysrhythmias.

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“…This was nearly three decades after an atrial lead was added to permanent pacing and dual-chamber pacemaker was commercialized. 1 At the time, pacemakers were indicated in over two-thirds of paced patients to correct symptoms that result from abnormally slow origination of impulses in the sinoatrial (SA) node. Yet since pacemakers were developed from bottom-up starting with VOO, they incrementally evolved to pace in a way such that every cardiac cycle ended with a ventricular sensed or paced event.…”

Section: Introductionmentioning

confidence: 99%

Up-righting Dual-Chamber Cardiac Pacing. The Story of Managed Ventricular Pacing

Casavant¹,

Belk²

2020

Preprint

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A significant milestone in cardiac pacing occurred approximately two decades ago when the primary operating mode was reimagined to more closely mimic normal top-down cardiac activation. Managed Ventricular Pacing (MVP) was an unprecedented dual-chamber mode as it preferentially paced the right atrium in the AAI/R mode and simultaneously protected against transient heart block, but only in the instance of a dropped ventricular beats. At the time, dual chamber DDD/R with atrial based timing and programmable atrioventricular (AV) delay was the state of the art. MVP "unlocked" conventional dualchamber pacing by not consistently requiring a 1:1 atrioventricular relationship as defined by an AV delay during its primary operating mode (i.e. AAI/R+). Described herein is the remarkable story of MVP, conceived before the pivotal and highly supportive Dual-Chamber and VVI Implantable Defibrillator (DAVID) Trial was introduced and rooted in lessons learned from "first-in man" permanent His bundle pacing.

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Bifocal Demand Pacing

Cited by 63 publications

References 11 publications

Clinical Spectrum of the Sick Sinus Syndrome

Clinical Spectrum of the Sick Sinus Syndrome

Cardiac Pacing — The State of the Art*

Up-righting Dual-Chamber Cardiac Pacing. The Story of Managed Ventricular Pacing

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