Does biventricular pacing improve outcomes compared to conventional right ventricular pacing in patients with atrioventricular block and left ventricular systolic dysfunction with NYHA class I-III heart failure?
Biventricular pacing is superior to conventional right ventricular pacing in patients with AV block, LV systolic dysfunction, and mild-to-moderate heart failure.
Biventricular pacing was superior to conventional right ventricular pacing in patients with atrioventricular block and left ventricular systolic dysfunction with NYHA class I, II, or III heart failure. (Funded by Medtronic; BLOCK HF ClinicalTrials.gov number, NCT00267098.).
Curtis et al. (2013) studied this question.