<i>Aims</i> - Treatment of arrhythmias evoked by hypothermia/rewarming remains challenging, and the underlying mechanisms are unclear. This <i>in vitro</i> experimental study assessed cardiac electrophysiology in isolated rabbit hearts at temperatures occurring in therapeutic and accidental hypothermia.<p><p> <i>Methods and results</i> - Detailed ECG, surface electrogram, and panoramic optical ...