Cardiac resynchronization therapy corrects dyssynchrony-induced regional gene expression changes on a genomic level.

ABSTRACT:

Background

Cardiac electromechanical dyssynchrony causes regional disparities in workload, oxygen consumption, and myocardial perfusion within the left ventricle. We hypothesized that such dyssynchrony also induces region-specific alterations in the myocardial transcriptome that are corrected by cardiac resynchronization therapy (CRT).

Methods and results

Adult dogs underwent left bundle branch ablation and right atrial pacing at 200 bpm for either 6 weeks (dyssynchronous heart failure, n=12) or 3 weeks, followed by 3 weeks of resynchronization by biventricular pacing at the same pacing rate (CRT, n=10). Control animals without left bundle branch block were not paced (n=13). At 6 weeks, RNA was isolated from the anterior and lateral left ventricular (LV) walls and hybridized

SUBMITTER: Barth AS 

PROVIDER: S-EPMC2801868 | biostudies-literature | 2009 Aug

REPOSITORIES: biostudies-literature