Introduction
Left ventricular free wall rupture (LVFWR) often occurs within 24 hours after myocardial infarction, and is a serious condition causing cardiac arrest due to cardiac tamponade [1]. As emergency measures, relieving the cardiac tamponade by pericardiocentesis and initiating venoarterial extracorporeal membrane oxygenation (VA ECMO) are considered. However, in cases of cardiac arrest, it is difficult to perform pericardiocentesis during chest compressions, and emergency left thoracotomy or initiating ECMO may be considered [2–4]. We experienced a case of cardiopulmonary arrest (CPA) due to LVFWR that was treated with VA ECMO and immediate induction of targeted temperature management (TTM).