TY - JOUR T1 - Reversible cardiomyopathy after radiofrequency ablation of 30-year persistent atrial tachycardia JF - BMJ Case Reports DO - 10.1136/bcr-2013-008727 VL - 2013 SP - bcr2013008727 AU - Atsushi Suzuki AU - Tsuyoshi Shiga AU - Kotaro Arai AU - Morio Shoda Y1 - 2013/12/10 UR - http://casereports.bmj.com/content/2013/bcr-2013-008727.abstract N2 - 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. ER -