Acute pulmonary embolism masquerading as acute myocardial infarction.

Pulmonary embolism can be extremely difficult to diagnose based on clinical presentation. Many studies have demonstrated certain electrocardiographic patterns commonly seen in pulmonary embolism, but few have described changes consistent with ST segment elevation myocardial infarction. In this report, we describe a patient who presented to the emergency department with electrocardiographic findings consistent with an anteroseptal myocardial infarction and his subsequent clinical course.