Condensed Abstract
A subgroup of patients with frequent (20% <) premature
ventricular contractions (PVCs) from the mitral annulus (MA) (MA-PVCs)
that significantly caused left ventricular (LV) dilation and
deterioration of the clinical status as compared to that in the subgroup
with rare (≤ 20%) MA-PVCs. Furthermore, the RFCA of these arrhythmias
was associated with a normalization of those abnormalities without any
adverse effects. In addition, interestingly, because the MA-PVCs were
successfully eliminated by radiofrequency catheter ablation (RFCA) from
not only the ventricular side of the MA or coronary sinus but also the
left atrial side of the MA, it may be necessary to initially consider a
trans-interatrial septal approach to ablate these PVCs.