title: Reversible cardiomyopathy after radiofrequency ablation of 30-year persistent atrial tachycardia.
abstract: Tachycardia-induced cardiomyopathy (TIC) is a reversible form of the left ventricular (LV) systolic dysfunction and is believed to be a relatively acute process. We report a TIC case with a 30-year history of long-lasting persistent atrial tachycardia involving a 44-year-old man previously diagnosed with dilated cardiomyopathy and a low LV ejection fraction (LVEF) of 20%. ECG revealed atrial tachycardia at 110-120 bpm. He was hospitalised with a worsening heart failure. His clinical status was New York Heart Association functional class III, and echocardiography revealed LV dilation and an LVEF of 9%. A two-dimensional speckle-tracking strain measurement revealed LV mechanical dyssynchrony. He underwent radiofrequency ablation for atrial tachycardia. After restoring sinus rhythm, his cardiac symptoms improved immediately. The LV mechanical dyssynchrony decreased a week after ablation, without changes in the LV dilation or LVEF. Thereafter, the LV dilation and systolic function gradually improved, and atrial tachycardia and heart failure remained absent.
authors: Department of Cardiology, Tokyo Women's Medical University, Tokyo, Japan.
authors: Atsushi
authors: A
authors: Suzuki
authors: Tsuyoshi
authors: T
authors: Shiga
authors: Kotaro
authors: K
authors: Arai
authors: Morio
authors: M
authors: Shoda
mesh_terms: D000328:Adult; D001281:Atrial Fibrillation / Q000473:pathology / Q000628:therapy*; D009202:Cardiomyopathies / Q000209:etiology / Q000503:physiopathology / Q000628:therapy*; D002311:Cardiomyopathy, Dilated / Q000503:physiopathology; D017115:Catheter Ablation; D004452:Echocardiography; D006333:Heart Failure / Q000209:etiology / Q000503:physiopathology / Q000628:therapy*; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D008297:Male; D013617:Tachycardia, Supraventricular / Q000473:pathology / Q000628:therapy*; D018487:Ventricular Dysfunction, Left / Q000209:etiology* / Q000503:physiopathology