Ventricular premature complexes from the left ventricular papillary muscles predominantly originate from the distal portion, and intracardiac echocardiography is crucial for guiding ablation.
VPCs originate predominantly from the distal portion of the PM. This knowledge may facilitate the mapping in patients with infrequent ectopic beats. Intracardiac echocardiography is of crucial importance for navigation of the ablation catheter and for assessment of its stability at PM target sites.
Peichl et al. (Fri,) studied this question.