This is a narrow complex tachycardia with a rate of 124 beats/min. The QRS morphology and axis are normal. The QTc is prolonged, at 529 ms (normal, 390-450 ms for men). The underlying P waves appear ...

Atrioventricular (AV) nodal reentrant tachycardia (AVNRT) is an irregular heart rhythm that can cause excessively fast heart rates. Though not usually serious, early diagnosis can help prevent severe ...

Atrial echo beats (a.k.a. "reciprocal beats") occur when a premature ventricular complex is conducted backward (retrograde) across the AV node back to the atrium (a.k.a "ventriculoatrial conduction").

This is a narrow-complex QRS rhythm which is quite fast. Looking closely at the last part of the QRS complex in leads V1 and V2, P waves can be seen. This is considered a "short RP tachycardia" and is ...

A 75-year-old woman with situs inversus totalis, dextrocardia, a patent foramen ovale (PFO), and a double-chamber right ventricle with subpulmonic outflow obstruction presented with highly symptomatic ...

Atrioventricular nodal reentrant tachycardia (AVNRT) is one of the most commonly encountered arrhythmias worldwide, and catheter ablation remains its treatment of choice. Ablation techniques, ...

Atrioventricular reentrant tachycardia (AVRT) is a rhythm problem in your heart that makes it beat too fast. It results from an extra connection between your upper and lower chambers. You might hear ...