John Moscona

All articles by John Moscona

AV nodal re-entrant tachycardia

Atrioventricular nodal re-entrant tachycardia (AVNRT) is a regular, narrow-complex tachycardia with typical ventricular rates between 150-250 beats per minute (bpm). This arrhythmia often has an abrupt onset and termination. The terms paroxysmal supraventricular tachycardia or paroxysmal atrial tachycardia have been used to describe this entity, although such nomenclature is not considered to be accurate. AVNRT…

AV block- 1st, 2nd and 3rd degree blocks

Atrioventricular (AV) heart block describes impairment of conduction from the atria to the ventricles via the AV junction. This impairment occurs when the atrial impulse is either delayed or does not conduct to the ventricles. The sites of block include the AV node, the bundle of His, and the bundle branches. The anatomic site of…

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