The case of a 60-year-old woman who received prehospital cardiopulmonary resuscitation for cardiopulmonary arrest is reported. In the hospital, coronary angiography was performed including percutaneous coronary intervention of the left anterior descending artery and placement of a cooling catheter. After approximately 30 min, severe hypotension progressively developed. Pericardial tamponade was identified and treated by pericardial puncture. Clear fluid was drained. Transesophageal echocardiography detected a perforation of the right atrial roof by the cooling catheter. Open surgery was performed immediately and the catheter was removed. The patient was discharged from the hospital without any further complication 10 days later.
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