Use of Programmed Ventricular Extrastimulus During Supraventricular Tachycardia to Differentiate Atrioventricular Nodal Re-Entrant Tachycardia From Atrioventricular Re-Entrant Tachycardia

Demonstration of dual atrioventricular nodal pathways utilizing a ventricular extrastimulus in patients with atrioventricular nodal re-entrant paroxysmal supraventricular tachycardia.

In patients with atrioventricular (A-V) nodal re-entrant paroxysmal supraventricular tachycardia (PSVT), atrial extrastimulus technique frequently reveals discontinuous A1-A2, H1-H2 curves suggestive of dual A-V nodal pathways. To further test the hypothesis that these curves in fact reflect dual A-V nodal pathways, a ventricular extrastimulus (VS) was coupled either to A2 at a fixed A1-A2 inte...

Coexistent Types of Atrioventricular Nodal Re-Entrant Tachycardia

T he mechanism of atrioventricular nodal re-entrant tachy-cardia (AVNRT) remains elusive. Both anatomic and functional models have been proposed. There has been elec-trophysiological evidence that the right and left inferior extensions of the human AV node and the atrionodal inputs they facilitate, which have been identified histologically, might provide the anatomic substrate for the slow path...

Isoprenaline and inducibility of atrioventricular nodal re-entrant tachycardia.

OBJECTIVES To examine the effect of isoprenaline on slow and fast pathway properties and tachycardia initiation. DESIGN Consecutive patients, prospective study. SETTING Referral centre for cardiology, academic hospital. PATIENTS 24 patients suffering from common type atrioventricular nodal reentrant tachycardia (AVNRT). INTERVENTIONS Programmed electrical stimulation and radiofrequency ...

Differentiating atrioventricular nodal re-entrant tachycardia from junctional tachycardia: conflicting reponses?

Electrophysiological predictors of propafenone efficacy in prevention of atrioventricular nodal re-entrant and atrioventricular re-entrant tachycardia

AIM To assess the efficacy of propafenone in prevention of atrioventricular nodal reentrant tachycardia (AVNRT) and orthodromic atrioventricular tachycardia (AVRT) based on the clinical results of arrhythmia recurrence and find the electrophysiological predictor of propafenone effectiveness. METHODS This retrospective study included 44 participants in a 12-month period, who were divided in tw...