CASE REPORTS
Ventricular far-field activity may provide a diagnostic challenge in identifying an origin of ventricular tachycardia arising from the left ventricular papillary muscle
Division of Cardiovascular Disease, University of Alabama at Birmingham, VH B147, 1670 University Boulevard, 1530 3rd AVE S, Birmingham, AL 35294-0019, USA
A 57-year-old man with idiopathic ventricular tachycardia (VT) underwent electrophysiological testing. Activation mapping revealed two remote earliest ventricular activation sites on anterior and posterior sides of the anterior papillary muscle. On the anterior side, far-field activity preceded near-field activity. Catheter ablation was successful on the posterior side. Ventricular far-field activity may provide diagnostic challenges in identifying papillary muscle VT origins.
* Corresponding author. Tel: +1 205 975 4724, Fax: +1 205 975 4720, Email: takumi-y{at}fb4.so-net.ne.jp