Acute Pericarditis: Second Stage- T Wave Inversion
Electrocardiogram obtained in a 17-year-old adolescent with acute pericarditis. An initial tracing showed ST segment elevation. The ST segments gradually returned to the baseline and the T waves then became inverted. This tracing was obtained 20 days after initial presentation. The T-wave inversion represents the second stage of electrocardiographic changes of acute pericarditis. As the condition resolved, the electrocardiogram became normal.