A 64-year-old man was admitted with right thoracic pain. His medical history was unremarkable. Chest examination showed diminished movement of the thorax on the right side. Auscultation revealed no breath sound over the middle lower right hemithorax. Heart sounds were heard on the right side. Electrocardiography and cardiac enzymes were consistent with acute anterior myocardiai infarction. Chest radiography showed extensive opaci-fication of the right hemithorax, and the heart outline was not defined (Figure 1A). Echocardiography demonstrated dextroposition of the heart with severe hypokinesy of the interventricular septum and apex. The left ventricular ejection fraction was 25%.
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