Premium
Cardiac resynchronization therapy reverses severe dyspnea associated with acceleration‐dependent left bundle branch block in a patient with structurally normal heart
Author(s) -
Prystowsky Eric N.,
Padanilam Benzy J.
Publication year - 2019
Publication title -
journal of cardiovascular electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.193
H-Index - 138
eISSN - 1540-8167
pISSN - 1045-3873
DOI - 10.1111/jce.13840
Subject(s) - medicine , left bundle branch block , cardiac resynchronization therapy , cardiology , heart failure , metoprolol , heart rate , bundle branch block , electrocardiography , ejection fraction , blood pressure
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.