PMID: 9420655Jun 1, 1995Paper

How does intermittent pacing modify the response to rapid ventricular pacing in experimental heart failure?

Journal of Cardiac Failure
G W MoeP W Armstrong

Abstract

Rapid ventricular pacing is widely accepted as a useful model to produce heart failure. The heart failure is associated with reduced myocardial energy stores and absence of cardiac hypertrophy. In this study, it was hypothesized that a modification of the protocol to intermittent pacing would permit time for partial recovery of myocardial energetics leading to improved cardiac function and development of hypertrophy. Eight dogs underwent conventional continuous right ventricular pacing to a biologic endpoint of severe heart failure (group 1). Another eight dogs underwent an intermittent pacing protocol over 7 weeks, consisting of 48-hour pacing alternating with 24-hour sinus rhythm (group 2) so as to produce the same total exposure to continuous pacing as in group 1. Six additional normal dogs were used as control animals for tissue metabolic data. Although both paced groups had similar directional changes in hemodynamic, neurohormonal, and echocardiographic variables, the absolute increases in pulmonary capillary wedge and right atrial pressures in group 2 (13 +/- 8 and 3 +/- 4 mmHg, respectively) were less marked than in group 1 (29 +/- 5 and 12 +/- 4 mmHg, respectively; both P = .002). Group 2 also had a more modest rise in ...Continue Reading

References

Jan 1, 1991·Circulation·H E Morgan, K M Baker
Jan 1, 1990·Canadian Journal of Physiology and Pharmacology·P J O'BrienP W Armstrong
Jan 1, 1987·Annual Review of Physiology·G Cooper
Dec 1, 1988·Canadian Journal of Physiology and Pharmacology·R J HowardP W Armstrong
Jun 1, 1971·American Heart Journal·H N ColemanE Braunwald
Sep 1, 1993·Journal of the American College of Cardiology·G W MoeP W Armstrong

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Citations

Dec 2, 2009·Current Heart Failure Reports·Rakesh GopinathannairBrian Olshansky
Nov 1, 2006·Heart Rhythm : the Official Journal of the Heart Rhythm Society·Bruce S Stambler
Nov 11, 2016·Circulation·Biykem BozkurtUNKNOWN American Heart Association Committee on Heart Failure and Transplantation of the Council on Clinical Cardiology; Council on
Jul 13, 2005·Pacing and Clinical Electrophysiology : PACE·Atul KhasnisRanjan Thakur

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