JAMA Internal Medicine

Inverted U Waves Red Flags in Electrocardiograms

This case report presents the electrocardiogram findings of a patient in their 50s with intermittent compression-like pain in the chest and a history of hypertension and diabetes.

Narrow Complex Tachycardia

This case report presents the electrocardiogram findings of a patient in their 50s with sudden onset, severe palpitations lasting for 2 hours.

Unusual Tachycardia After Cocaine Use

This case report presents the electrocardiogram findings of a patient in their 20s with severe midsternal chest pain of several hours’ duration after cocaine use.