Europace Advance Access originally published online on March 11, 2008
Europace 2008 10(4):469-470; doi:10.1093/europace/eun051
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ELECTROPHYSIOLOGY AND ABLATION
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
Division of Cardiovascular Diseases, University of Alabama at Birmingham, VH B147, 1670 University Boulevard, 1530 3rd AVE S, Birmingham, AL 35294-0019, USA
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
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.
Key Words: Ventricular tachycardia, Aortic sinus cusp, Epicardial, Myocardial fibre, Electrophysiology
* Corresponding author. Tel: +1 205 975 4724; fax: +1 205 975 4720. E-mail address: takumi-y{at}fb4.so-net.ne.jp
Manuscript submitted 15 December 2007. Accepted after revision 13 February 2008.