Pneumomediastinum mimicking acute ST-segment elevation myocardial infarction
Abstract:
Pneumomediastinum is characterized by dissecting air within the connective tissues supporting the mediastinum. This condition has been associated with multiple electrocardiographic abnormalities including T-wave inversion, electrical alternans, loss of R wave progression, and low voltage QRS. We describe a case of pneumomediastinum with electrocardiographic changes mimicking acute ST-segment elevation myocardial infarction. Laboratory studies and echocardiography demonstrated no evidence of myocardial injury, and the electrocardiographic abnormality promptly resolved with resolution of the pneumomediastinum. The apparent ST-segment elevation appeared to be the result of electrocardiographic artifact, possibly related to epidermal stretch synchronous with the cardiac cycles.
Related Concept Videos
Acute Coronary Syndrome I: Introduction
Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations
Mitral Stenosis II: Clinical features and Diagnostic Tests
Acute Coronary Syndrome III: Diagnostic Studies
Pulmonary Embolism I: Introduction
Pulmonary Embolism I: Introduction

