Summary

We report on an 84-year-old woman with anteroseptal acute myocardial infarction. Emergency coronary angiography revealed the occlusion of proximal left anterior descending artery without collateral circulation, and percutaneous coronary intervention was performed. Two drug eluting stents were implanted, and the procedure was concluded with thrombolysis in myocardial infarction grade 3 without complications. Postoperatively, no murmur was audible on auscultation and no shunt flow was observed on transthoracic echocardiography (TTE), and normal blood pressure was maintained. On day 2, however, the patient’s vital signs deteriorated to a state of shock and systolic murmur appeared at the apical region. TTE showed a left-to-right shunt in the apical septal region, and ventricular septal perforation was diagnosed. Although emergency surgery was considered, the patient’s vital signs improved the following day. The disappearance of the cardiac murmur and the shunt was confirmed. The clinical course was uneventful thereafter, and the patient was discharged.