Defibrillation is often considered ineffective in hypothermic cardiac arrest patients with shockable rhythms, particularly at core temperatures ≤30 °C, and the optimal timing and number of shocks as well as the role of rewarming have remained uncertain. However, a retrospective observational study published in Resuscitation showed that defibrillation attempts can be successful even before rewarming in patients with core temperatures ≤30 °C, helping to clarify this longstanding clinical dilemma.