The first QRS complex is narrow and supraventricular (*). It is followed by a rapid and irregular rhythm with a rate of up to 300 beats/min. The QRS complexes are unusual and show marked variability ...

The diagnosis is sinus rhythm, PVCs and echo beats (complexes). The rhythm is irregular but there is a repeating pattern (group beating) with three QRS complexes and a pause. Therefore, the rhythm is ...

A supraventricular arrhythmia is an irregular heart rate that begins above the ventricles, or lower chambers of the heart. Most, but not all, supraventricular arrhythmias begin in the atria, or top ...

Dr. Nino Mihatov: A 52-year-old woman was evaluated for a new wide-complex tachycardia that developed while she was hospitalized for the management of seizures. Five days before the development of ...

Narrow-complex tachyarrhythmias are rapid heart rhythms originating in the upper heart chambers, characterized by a QRS duration of less than 120 milliseconds on an EKG. These arrhythmias can be ...

Supraventricular tachycardia is a term used to describe any heart rhythm that is greater than 100 beats per minute originating from above the AV node (the atrium). The term “SVT” can be confusing at ...