INTRODUCTION Atrioventricular nodal reentrant tachycardia (AVNRT) is the most common supraventricular tachycardia referred for ablation. High success rates have been accompanied with a small risk of atrioventricular (AV) block. Cryoablation has been used as an alternative to radiofrequency (RF) ablation, but studies have been underpowered in comparing the 2 techniques. METHODS AND RESULTS An ...

BACKGROUND Even after successful slow pathway (SP) ablation for atrioventricular-nodal reentrant tachycardia (AVNRT), there may be clinical recurrence in certain patients and it is clinically important to be able to predict that. METHODS AND RESULTS In 97 patients with common type AVNRT, the effective refractory period (ERP) of the fast pathway (FP), SP-ERP, and prolongation of the atrio-His ...

av-node modification by catheter rf energy delivery is treatment of choice in the symptomatic patients with avnrt. this study included 30 patients with avnrt (19 women, 11 men). we did slow pathway ablation in 29 cases successfully. maximum effective energy delivery was 40 watts for 40 msec. 1:1 av conduction increased from 290±40 msec before ablation to 340±65 msec after ablation. also av-node...

Tachycardias that are successfully ablated in the vicinity of the atrioventricular (AV) node are common, and although frequently successfully treated, are among the most difficult arrhythmias to understand in cardiac electrophysiology. Even AV node reentrant tachycardia (AVNRT), despite near universal cure, is complex with the anatomic constructs for typical, atypical forms, left-sided AVNRT, u...

Sequence of retrograde atrial activation is not a reliable criterion for the classification of atrioventricular nodal re-entrant tachycardia (AVNRT) into typical and atypical types. The conventional concept of a lower common pathway is not supported by current evidence and does not represent a reliable or reproducible criterion. The distinction between 'fast-slow' and 'slow-slow' forms is not u...

We report the case of a 46-year old patient in whom an electrophysiology study (EP) was performed due to paroxysmal supraventricular tachycardia documented in 12-lead ECG. During the EP study, supraventricular tachycardia was induced easily and it corresponded to orthodromic AV reentry tachycardia (AVRT) using a concealed left free wall accessory pathway. However, during the study AVRT spontane...

Our understanding of the variants slow pathway (SP) and associated atypical atrioventricular (AV) nodal reentrant tachycardia (NRT) is still growing. We have identified extending outside Koch’s triangle along tricuspid annulus, including superior, superoanterior inferolateral right atrial SP atypical, fast-slow AVNRT. review history each variant, their electrophysiological characteristics relat...

BackgroundIt remains difficult to definitively distinguish supraventricular tachycardia (SVT) mechanisms using 12-lead ECG alone. Machine learning may identify visually imperceptible changes on ECGs and improve ability determine SVT mechanisms.ObjectiveTo develop a Convolutional Neural Network (CNN) that identifies mechanism according the gold-standard of ablation, compare CNN performance again...