Loss of left ventricular component of biventricular pacing with low atrial rhythm, what is the mechanism?

J Arrhythm. 2021 Aug 17;37(5):1374-1376. doi: 10.1002/joa3.12609. eCollection 2021 Oct.


Effective biventricular pacing is important to improve survival in patients with heart failure. We report a case of a patient with heart failure, who underwent cardiac resynchronization therapy, who had loss of biventricular pacing when in low atrial rhythm. We discuss the probable mechanism for the same.

Keywords: Cardiac Resynchronization Therapy with Defibrillation (CRT‐D); biventricular pacing; low atrial rhythm.