Benjamin Bouyer, Nicolas Derval, Thomas Pambrun, Romain Tixier, Marine Arnaud, Samuel Buliard, Rémi Chauvel, Hugo Marchand, Xavier Bouteiller, Kostantinos Vlachos, Ciro Ascione, Masaaki Yokoyama, Christopher Kowalewski, Mélèze Hocini, Pierre Jaïs, Frederic Sacher, Michel Haïssaguerre, Josselin Duchateau
BACKGROUND: Differentiating between atypical atrioventricular node re-entrant tachycardia (aAVNRT) and orthodromic reciprocating tachycardia (ORT) utilizing a septal accessory pathway is a complex challenge. OBJECTIVE: We introduce the "local VA index," a straightforward method based on signals from the coronary sinus (CS) catheter, to distinguish between these arrhythmias during tachycardia and entrainment. The V-A interval on the CS catheter is measured during tachycardia and entrainment, at the site of earliest atrial activity...
January 27, 2024: Heart Rhythm: the Official Journal of the Heart Rhythm Society