The initial part of the ECG shows a regular narrow complex tachycardia at a rate of 160 beats/min. The QRS complex duration is normal (0.08 sec) and there is normal morphology and normal axis between ...

A 29-year-old woman has a known history of palpitations from a diagnosis of supraventricular tachycardia that usually terminates when she performs a Valsalva maneuver. Today, she presents to the ...

At a heart rate of 150 beats per minute, the flutter waves are usually obscured by T waves, making the surface ECG tracing for this tachycardia difficult to distinguish from that of other ...

This is a narrow QRS complex tachycardia with a very fast heart rate (about 250 beats per minute). It is quite difficult to indentify any P wave activity to determine the exact etiology. Most commonly ...