Right ventricular dilatation and systolic dysfunction and relationship to QRS duration in patients with left bundle branch block and cardiomyopathy.
Seung Jung ParkDeborah H KwonJohn Jack RickardNiraj VarmaPublished in: Pacing and clinical electrophysiology : PACE (2021)
The rates of RVD and/or RVsD increased with QRS widening, particularly when QRSd exceeded 180 ms. This may diminish anticipated CRT response rates in cardiomyopathy patients with LBBB.