Impact of pulmonary vein isolation on left bundle branch block following tachycardia-induced cardiomyopathy in a patient with persistent atrial fibrillation.
A 61-year-old man was referred to our hospital with exertional dyspnea. Electrocardiography showed atrial fibrillation (AF) with a heart rate of 116 bpm and left bundle branch block (LBBB). Chest radiography demonstrated pulmonary congestion and cardiomegaly with a cardiothoracic ratio of 57%. Transthoracic echocardiography revealed a severely reduced left ventricular systolic function (ejection fraction: 32%), suggesting tachycardia-induced cardiomyopathy (TIC) due to AF. Following treatment for congestive heart failure and complete isolation of each pulmonary vein, the LBBB disappeared, with a complete recovery of the cardiac systolic function. This report describes a case of transient reversible LBBB associated with systolic dysfunction treated with catheter ablation.
Department of Cardiology, The Cardiovascular Institute, Japan.
Keitaro
K
Senoo
Takayuki
T
Otsuka
Shinya
S
Suzuki
Koichi
K
Sagara
Takeshi
T
Yamashita
D001281:Atrial Fibrillation / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D002037:Bundle-Branch Block / Q000209:etiology / Q000503:physiopathology / Q000601:surgery*; D009202:Cardiomyopathies / Q000150:complications* / Q000175:diagnosis / Q000503:physiopathology; D017115:Catheter Ablation / Q000379:methods*; D004452:Echocardiography; D004562:Electrocardiography; D005500:Follow-Up Studies; D006329:Heart Conduction System / Q000503:physiopathology / Q000601:surgery; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D011667:Pulmonary Veins / Q000601:surgery*; D017180:Tachycardia, Ventricular / Q000150:complications* / Q000175:diagnosis / Q000503:physiopathology; D016277:Ventricular Function, Left / Q000502:physiology