Ventricular tachycardia with a myocardial fibre travelling from the origin in the right aortic sinus cusp to the epicardial breakout site of the right ventricular outflow tract.
A 74-year-old man with idiopathic ventricular tachycardia (VT) with a QRS morphology with a left bundle branch block and right inferior axis underwent electrophysiologic testing. Successful ablation was achieved at the right coronary cusp (RCC) where an excellent pace map with long stimulus-to-QRS interval (St-QRS) (85 ms) was obtained. An excellent pace map was also obtained on the epicardial surface approximately 1 cm away from the successful ablation site and the St-QRS was shorter (40 ms). These findings suggested that a myocardial fibre travelling from the origin in the RCC to the epicardium of the right ventricular outflow tract might exist.
Yamada
Takumi
T
Division of Cardiovascular Diseases, University of Alabama at Birmingham, VH B147, 1670 University Boulevard, 1530 3rd AVE S, Birmingham, AL 35294-0019, USA. takumi-y@fb4.so-net.ne.jp
McElderry
H Thomas
HT
Doppalapudi
Harish
H
Kay
G Neal
GN
D000368:Aged; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology; D006352:Heart Ventricles / Q000473:pathology* / Q000503:physiopathology; D006801:Humans; D008297:Male; D009206:Myocardium / Q000473:pathology*; D010496:Pericardium / Q000473:pathology* / Q000503:physiopathology; D012850:Sinus of Valsalva / Q000473:pathology* / Q000503:physiopathology; D017180:Tachycardia, Ventricular / Q000175:diagnosis* / Q000473:pathology*