Echocardiographic and Clinical Response to Cardiac Resynchronization Therapy in Heart Failure Patients with and without Previous Right Ventricular Pacing

Abstract

Despite similar ejection fraction pre-CRT, patients upgraded to CRT with previous RVp have smaller end-systolic volume and respond to CRT at least as well as, if not better than, other wide QRS heart failure patients. A greater improvement in ejection fraction and a lower risk of death or heart failure hospitalization when adjusted for baseline characteristics were seen in those with previous RVp.