February 5th Question

Abstract

A 64-year-old man with frequent symptomatic premature ventricular complexes is brought to the electrophysiology laboratory for premature ventricular complex ablation. Earliest site of activation during premature ventricular complex is noted at location of ablation catheter (ABL; Figure), a consistent far-field signal 48 ms ahead of onset of QRS. Irrigated radiofrequency ablation (40 watts; 30 mL/min) is performed at this site. What structure could sustain collateral injury during ablation? Answer OptionsA. Left anterior descending coronary artery B. Left circumflex coronary artery C. Right coronary artery D. Atrioventricular node E. Right bundle branch February 5th Question