2022年11月18日 · AVNRT is caused by a reentry circuit in or around the AV node. The circuit is formed by the creation of two pathways forming the re-entrant circuit, namely the slow and fast pathways.

ECG features of Atrioventricular Nodal Reentrant Tachycardia (AVNRT). There are three types of AVNRT and the difference between them lies in the configuration of the re-entry circuit. Virtually all cases of AVNRT are characterized by having one fast and one slow pathway.

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.

AV nodal reentrant tachycardia, AVNRT, is the most common cause of supraventricular tachycardia (SVT). It is more common in women than in men and presents in all age groups. Patients with AVNRT have at least two pathways of tissue in their AV node that allows for an abnormal electrical circuit to perpetuate within their AV node.

2023年8月7日 · The diagnosis of AVNRT requires visualization on an electrocardiogram (ECG). In most cases, an ECG will show heart rate between 140 and 280 beats per minute (bpm), and in the absence of aberrant conduction, a QRS complex of fewer than 120 milliseconds.

2010年8月24日 · Typically, AVNRT is a narrow-complex tachycardia, ie, QRS duration <120 ms, unless aberrant conduction, which is usually of the right bundle-branch type, or a previous conduction defect exists. Tachycardia-related ST depression …

2012年12月11日 · AV Nodal Re-entry Tachycardia (AVNRT) or Atrial-Ventricular Nodal Re-entry Tachycardia is a supra-ventricular arrhythmia, and more precisely, a nodal arrhythmia. AVNRT is the most frequently occurring form of regular tachycardia. More females than males have signs of AVNRT. The ratio is approximately 3:1.

ECG features: Orthodromic: Narrow complex tachycardia 200-300bpm; P waves hidden in QRS complexes or retrograde Inverted inferior and Lead I P waves indicate left sided pathway; T wave inversion; ST depression; Antidromic: Wide complex tachycardia 200-300bpm

2025年2月2日 · Reentrant atrioventricular nodal tachycardia (AVNRT), it is the most frequent supraventricular paroxysmal tachycardia in healthy hearts, and may represent 60% of them 1. It is more frequent in women and in intermediate ages especially between 40-50 years.

ECG in AVNRT with a recap on Adenosine for differentiating AVNRT from AVRT.