Transient ST-segment elevation resembling acute myocardial infarction in a patient with a right secondary spontaneous pneumothorax.

A rare cause of ST-segment elevation mimicking myocardial infarction has been reported in the setting of acute pneumothorax. We present a middle-aged woman with a right-sided secondary pneumothorax who developed severe chest pain associated with ST-segment elevation suggestive of acute myocardial infarction. Symptoms resolved immediately after advancement of the dislodged chest drain. A subsequent coronary angiogram was normal. This case highlights an uncommon electrocardiographic alteration and discusses possible pathophysiological mechanisms.