Author/Authors :
Miranda, Rodrigo Queen s University - Kingston General Hospital - Department of Cardiology, Kingston , Diez, Juan Cruz Lopez Queen s University - Kingston General Hospital - Department of Cardiology, Canada , Michael, Kevin Queens University - Kingston General Hospital - Department of Cardiology, Canada , Baranchuk, Adrian Queens University - Kingston General Hospital - Department of Cardiology, Canada
Abstract :
A 29-year-old male presented with longstanding exercise related palpitations. Transthoracic echocardiogram was normal. An event recorder showed no symptom-rhythm correlation. During the treadmill test (stage 4 Bruce protocol) the patient had developed sinus tachycardia at 185 bpm (Fig. 1a) followed by a single premature atrial contraction with long PR interval (white arrow, Fig. 1b) initiating a supraventricular tachycardia at 250 bpm lasting 3 minutes (Fig. 1c).
