Atrioventricular Re-entry Tachycardia (AVRT) is a form of paroxysmal supraventricular tachycardia that occurs in patients with accessory pathways, usually due to formation of a re-entry circuit between the AV node and accessory pathway. ECG features depend on the direction of conduction, which can be orthodromic or antidromic.

2020年1月14日 · In the case of atrioventricular reentry tachycardia (AVRT; represented in blue), 26 of the 29 cases showed atrial advancement equal or more than the PHC prematurity. Three cases of AVRT showed decremental conduction in response to early PHCs but did not affect the diagnosis (see section Discussion).

2024年2月27日 · An experienced electrophysiologist can use a 12-lead ECG during SVT to differentiate between different mechanisms, such as an orthodromic AVRT using a concealed accessory pathway as the retrograde limb of the tachycardia, AVNRT, antidromic AVRT using the accessory pathway as the antegrade limb of the tachycardia (presenting as wide QRS ...

Download scientific diagram | Intracardiac tracing during AVRT with three surface ECG leads and EGMs recorded from ablation catheter (ABL) placed in right atrium, His (His), coronary sinus (CS)...

During programmed ventricular extra-stimulation, displacement of the potential into and away from the ventricular electrogram (“VH jump”) differenti-ated it from a high-frequency component of the ventricular signal. During entrainment of AVRT, the His bundle was captured either antidromically or orthodromically.

2023年11月1日 · We present a case of antidromic AVRT involving an atriofascicular pathway in a patient with an atretic coronary sinus os. This patient had left ventricular dysfunction with rate-related left bundle branch block aberrancy in sinus rhythm. In the electrophysiology lab, there was VA dissociation for a few beats during antidromic tachycardia.

Atrioventricular reentrant tachycardia occurs when a reentrant circuit is present outside of the AV node through an abnormal conduction pathway that connects the atrium...

2008年1月1日 · Differentiating atrioventricular nodal reentrant tachycardia (AVNRT) from orthodromic atrioventricular reentrant tachycardia (AVRT) can be difficult. The His bundle and atria are activated sequentially over the AV node during entrainment of AVNRT from the ventricle but simultaneously during supraventricular tachycardia (SVT).

Atrioventricular re-entrant tachycardia (AVRT) is a sub-set of SVTs caused by an accessory pathway (AP) often connecting the atria and ventricle bypassing the AV node. Accessory pathways can conduct from the atrium to the ventricle (antegradely), retrogradely (ventricle to …

AEG: AVRT demonstrates a 1:1 atrial to ventricular ratio with the atrial signal typically located just following the QRS complex in the early T wave. In comparison to AVNRT, the VA time is slightly longer, often >70msec from the onset of the ventricular to the …