Effects of long-term biventricular stimulation for resynchronization on echocardiographic measures of remodeling

Circulation
Leslie A SaxonVIGOR Congestive Heart Failure Investigators

Abstract

Long-term ventricular resynchronization therapy improves symptom status. Changes in left ventricular remodeling have not been adequately evaluated. Fifty-three patients with systolic heart failure and bundle-branch block underwent implantation of biventricular stimulation (BVS) devices as part of a randomized trial. Echocardiograms were acquired at randomization and at 6-week intervals until completion of 12 weeks of continuous BVS. There were no changes in heart rate or QRS duration after 12 weeks of BVS. Serum norepinephrine values did not change with BVS. After 12 weeks of BVS, left atrial volume decreased. Left ventricular end-systolic and end-diastolic dimensions and left ventricular end-systolic volume also decreased after 12 weeks of BVS. Sphericity index did not change. Measures of systolic function, including left ventricular outflow tract and aortic velocity time integral and myocardial performance index, improved. Long-term resynchronization therapy results in atrial and ventricular reverse remodeling and improved hemodynamics.

Associated Clinical Trials

Sep 11, 2006·Patricio A. Frias, MD

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