JAMA Internal Medicine

An Interesting Wide QRS Complex Tachycardia

This case report describes a patient in their 70s who presented to the emergency department with sudden-onset tachycardia that had been going on for more than 1 day after experiencing recurrent palpitations for the past 20 years.

Arrhythmia During Anaphylaxis An Intrinsic or Extrinsic Cause?

A patient in their 50s presented to the emergency department (ER) within 30 minutes of ingestion of prawns at a restaurant with complaints of an itchy skin rash, and generalized weakness; his pulse rate was 79 bpm, his blood pressure…

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.