Summary

“In at least 25% of patients with heart failure, some form of ventricular conduction delay will complicate the course of their disease,” according to David A. Kass, MD, Division of Cardiology, Johns Hopkins University School of Medicine.

Dr. Kass noted that all rhythm disturbances create electrical “dissonance” in electrical activation and mechanical contraction between and/or within ventricles, reducing pump efficiency and lowering ejection fraction.