Objective: It has been observed that the cannulation of the coronary sinus (CS) is easier in patients with atrioventricular nodal reentry tachycardia (AVNRT). In this study, we aimed to test the validity of this observation Methods: We included 29 patients undergoing electrophysiological study (EPS) with the diagnosis of tachycardia and 22 patients undergoing coronary artery angiography (CAG) T...

Second-degree atrioventricular (AV) nodal block with 2:1 AV conduction during atrioventricular nodal reentrant tachycardia (AVNRT) has been previously described. We report a patient who developed AVNRT during which 3:1 intra-infra-Hisian block due to catheter manipulation was observed. This was followed by gradual, incremental recovery of AV conduction. AVNRT accounts for approximately 50% of c...

BACKGROUND Recent anatomical and electrophysiological studies have demonstrated that in the human atrioventricular node there are two main extensions, the rightward and leftward posterior nodal extension (LPNE). The occurrence of eccentric retrograde atrial activation has been demonstrated in several previous reports to be from 6 to 8% in patients with AVNRT. OBJECTIVES The study was performe...

To the Editor: Michowitz et al present an interesting study on the prevalence of familial atrioventricular nodal reentrant tachycardia (AVNRT). They report a prevalence of 127 out of 10 000 of familial AVNRT with a likely autosomal dominant pattern of inheritance (with incomplete penetrance). A potentially important question is whether all the observed cases represent “pure” familial AVNRT or w...

AIM Sub-threshold stimulation (STS) applied during atrioventricular nodal re-entrant tachycardia (AVNRT) of the common (slow-fast) type has been shown to effectively characterise target sites suitable for slow pathway (SP) ablation but has not been investigated in the setting of fast-slow and slow-slow variants. METHODS AND RESULTS Seventeen consecutive patients (52+/-16 years, 12 female) wit...

Abstract Introduction Atrioventricular nodal reentry tachycardia (AVNRT), Wolf-Parkinson-White syndrome (WPW), and Ectopic atrial (EAT) are common arrhythmias associated with lower quality of life. The use radiofrequency ablation (RFA) treatment has increased over time, however long-term risk adverse outcomes after RFA in patients AVNRT, WPW, or EAT is unknown. Purpose To examine the need for p...

Our purpose was to describe a technique of atrioventricular (AV) node modification for patients with drug refractory AV nodal reentrant tachycardia (AVNRT). Nine patients (mean age, 45 +/- 20; range, 14-82) with recurrent drug refractory AVNRT (n = 8) or sudden cardiac death thought to be precipitated by AVNRT (n = 1) underwent a percutaneous catheter procedure to modify AV nodal function. The ...

Our purpose was to describe a technique of atrioventricular (AV) node modification for patients with drug refractory AV nodal reentrant tachycardia (AVNRT). Nine patients (mean age, 45±20; range, 14-82) with recurrent drug refractory AVNRT (n=8) or sudden cardiac death thought to be precipitated by AVNRT (n = 1) underwent a percutaneous catheter procedure to modify AV nodal function. The area b...

AIMS The difference between the stimulus-atrial and ventriculo-atrial intervals (SA-VA) and between the post-pacing interval and the tachycardia cycle length (PPI-TCL) during entrainment from the right ventricular apex distinguishes atrioventricular node reentrant (AVNRT) from orthodromic atrioventricular reentrant tachycardia (AVRT). We hypothesized that these features still apply when entrain...

AIMS This is a prospective, randomized study comparing transvenous cryoablation with radiofrequency (RF) ablation of atrioventricular nodal re-entrant tachycardia (AVNRT). METHODS AND RESULTS In this pilot trial, 200 patients with AVNRT were randomized to undergo cryoablation or RF ablation of the slow pathway. A 7 Fr 4-mm-tip cryocatheter (Cryocath) was used for cryomapping and cryoablation....