New heart procedure aims to stop AFib from coming back

This study looks at people with paroxysmal atrial fibrillation (a type of irregular heartbeat) that came back after a previous treatment. It compares two approaches during a repeat procedure: isolating the superior vena cava alone versus also adding ethanol (alcohol) infusion into the vein of Marshal. The goal is to see which method better prevents the irregular heartbeat from returning one year later. About 100 adults will take part.