RT Journal Article SR Electronic T1 Cardiac Resynchronization Therapy—All You Need to Know, 2006 JF MD Conference Express YR 2006 FD SAGE Publications VO 6 IS 1 SP 10 OP 11 DO 10.1177/155989770601003 UL http://mdc.sagepub.com/content/6/1/10.abstract AB “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.