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 ...
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 ...
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