We report a case of circulatory collapse and cardiac arrest immediately after the patient was turned from the lateral decubitus position to the supine position following left pneumonectomy. Closed-chest resuscitation with medical and fluid interventions were inadequate. Emergency chest showed the deviation of heart to the left side and blunted apex. Left ventricular rupture during resuscitation was found subsequent thoracotomy. This rupture and inadequacy of closed-chest resuscitation were felt to be associated with the operative pneumonectomy and pericardiotomy.