PURSE-STRING PV BOX ISOLATION: A LESS INVASIVE MODIFIED MAZE PROCEDURE FOR NON-MITRAL ATRIAL FIBRILLATION
T. Taguchi, K. Imai, M. Watanabe, H. Kodama, K. Katayama, S. Takahashi, T. Kurosaki, T. Sueda
Department of Cardiovascular Surgery, Hiroshima University Hospital, Hiroshima, Japan
Introduction: We have developed purse-string pulmonary box isolation (pPBVI) for atrial fibrillation (AF) without mitral valve disease (MVD).
Methods: Nine non-MVD paroxysmal AF (pAF) cases (3 ASD, 3 AVR 1 TVR and 2 OPCAB) were received pPVBI. Box ablation line was created by using bipolar radiofrequency device with bilateral epicardial PV isolation line and upper and lower connecting line (Fig.), without incision of left atrial wall using purse-string technique. All patients were received continuous monitor ECG (in hospital) and Holter ECG of every 6 month (after discharge).
Results: At discharge, freedom from AF was 89%. In the patients of AF free at discharge, 100% of patients were free from pAF at averaged more than 12 months follow-up.
Conclusions: pPVBI can be a less invasive and effective procedure for non-MVD pAF.
