Double shock strategy for AFib: a promising idea that ran out of steam

This study compared using two quick electric shocks versus the usual single shock to try to restore a normal heart rhythm in people with atrial fibrillation who have factors that make a single shock less likely to work, such as obesity or lung disease. Only 5 people took part before the study was stopped early, so we cannot draw firm conclusions. The goal was to see if the dual-shock approach could safely and effectively stop the abnormal rhythm.