Cardiac resynchronization therapy reverses severe dyspnea associated with acceleration‐dependent left bundle branch block in a patient with structurally normal heart. (11th January 2019)

• Record Type: Journal Article
• Authors: Prystowsky, Eric N.; Padanilam, Benzy J.
• Is Part Of: Journal of cardiovascular electrophysiology. Volume 30:Number 4(2019)
• Page Start: 517
• Page End: 519
• Publication Date: 2019-01-11
• Subjects: biventricular pacemaker -- cardiac resynchronization therapy -- dyspnea -- normal ejection fraction; Blood vessels -- Physiology -- Periodicals; Electrophysiology -- Periodicals; Heart -- Physiology -- Periodicals; 612.1
• DOI: 10.1111/jce.13840
• Languages: English
• ISSNs: 1045-3873

Abstract

Abstract: A 55‐year‐old woman presented with severe dyspnea during acceleration‐dependent left bundle branch block (LBBB). Metoprolol initially ameliorated symptoms by preventing the heart rate at which LBBB occurred. Over time LBBB presented at slower heart rates and the patient developed recurrent dyspnea during an activity that correlated with the development of LBBB on event monitors and exercise stress testing. A biventricular pacemaker was implanted, and the patient's symptoms remain resolved after a follow‐up of over 4 years. More research is needed to define the use of cardiac resynchronization therapy in patients with normal heart function.