Abstract
A 43-year-old woman with a history of hyperventilation was found to have an abnormal electrocardiogram. Echocardiography showed left ventricular wall thinning and a ventricular aneurysm. She was admitted to hospital for detailed examination. Old myocardial infarction was suspected from the cardiac MRI and myocardial scintigraphy findings. While coronary angiography revealed no significant stenosis, coronary vasospasm was detected by the acetylcholine challenge test. The patient’s myocardial infarction was thought to have been caused by coronary vasospasm. Hyperventilation occurred during the acetylcholine challenge test and administration of nitroglycerin improved the patient’s hyperventilation. These findings suggest that hyperventilation is associated with coronary vasospasm in the present patient.
