Prevention of adverse electrical and mechanical remodeling with biventricular pacing in a rabbit model of myocardial infarction

Heart Rhythm : the Official Journal of the Heart Rhythm Society
Samir SabaBarry London

Abstract

Biventricular (BIV) pacing can improve cardiac function in heart failure (HF). This study sought to investigate the mechanisms of benefit of BIV pacing using a rabbit model of myocardial infarction (MI). New Zealand White rabbits were divided into 4 groups (sham-operated [C], MI with no pacing [MI], MI with right ventricular pacing [MI+RV], and MI with BIV pacing [MI+BIV]) and underwent serial electrocardiograms and echocardiograms. At 4 weeks, hearts were excised and tissue was extracted from various areas of the left ventricle (LV). Four weeks after coronary ligation, BIV pacing prevented systolic and diastolic dilation of the LV as well as the reduction in its fractional shortening, restored the QRS width and the rate-dependent QT intervals to their baseline values, and prevented the decline of the ether-a-go-go (Erg) protein levels. This prevention of remodeling was not documented in the MI+RV groups. In this rabbit model of BIV pacing and MI, we show prevention of adverse mechanical and electrical remodeling of the heart. These changes may underlie some of the benefits seen with BIV pacing in HF patients with more severe LV dysfunction.

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Citations

Nov 26, 2010·Heart Failure Reviews·Richard N CornelussenFrits W Prinzen
Mar 7, 2009·Current Heart Failure Reports·Christina Salazar, William T Abraham
Mar 27, 2012·American Journal of Physiology. Heart and Circulatory Physiology·Ohad ZivGideon Koren
Jan 1, 2010·Circulation. Arrhythmia and Electrophysiology·Samir SabaBarry London
Jun 3, 2014·Heart Rhythm : the Official Journal of the Heart Rhythm Society·Grant V ChowDavid A Kass
Sep 1, 2015·European Heart Journal·Gregg W StoneUNKNOWN PRomPT Trial Investigators
Oct 29, 2015·European Heart Journal·Christophe LeclercqFrank Ruschitzka
Jun 25, 2016·Nature Reviews. Drug Discovery·Robert G GourdiePeter Kohl
Feb 19, 2017·American Journal of Physiology. Heart and Circulatory Physiology·Patrick J MorrisseyGideon Koren
Sep 4, 2018·Frontiers in Pharmacology·Ning LiQizhu Tang
Oct 1, 2008·Drug Discovery Today. Disease Models·Steven M Pogwizd, Donald M Bers

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