Answer

Wolff-Parkinson-White (WPW) syndrome: The patient has a short PR interval and a small delta wave that is best seen in leads I and V3 through V4.

The Q waves are the pseudoinfarct pattern of WPW syndrome and are actually the delta waves.

BACKGROUND

A 23-year-old man presents to the hospital with chest pain that has lasted 30 minutes.

Hint

The PR interval seems short.