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Av Node - DOAJ

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Last Updated: 02 July 2022

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Simultaneous dual AV node antegrade conduction (2 for 1) and lower common pathway (2–1) block illustrate AVNRT physiology

We report a rare case of spontaneous onset of Atrioventricular nodal tachycardia via 2 for 1 condition, converting to a 2:1 AV block due to lower common pathway block and finally transition to 1:1 tachycardia. During 2 for 1 initiation, the premature atrial p wave passes through both the fast and slow pathway simultaneously, and is met with subsequent AVNRT with 2:1 block.

Source link: https://doi.org/10.1016/j.ipej.2019.12.007


Incidence of Dual AV Node Physiology Following Termination of AV Nodal Reentrant Tachycardia by Adenosine-5'-Triphosphate: A Comparison with Drug Administration in Sinus Rhythm

In 75% of patients with intractable nodal reentrant tachycardia, the administration of adenosine triphosphate in sinus rhythm has identified dual atrioventricular node physiology. Following administration of 17. 1 + 9. 4 mg ATP in sinus rhythm, 62 patients with AVNRT who completed the study experienced DAVNP, while 30 others experienced DAVNP at the end of AVNRT following administration of 10. 6 + 2. 4 mg ATP. Following AVNRT's deposition of DAVNP, there was a strong correlation, but ATP doses were required for tachycardia termination. None of the 18 control patients had DAVNP at the ATP test during sinus rhythm, but 1 had a small PR lift after ending AVRT with ATP. Hence, results at the end of tachycardia by ATP may be helpful in the noninvasive diagnosis of a paroxysmal supraventricular tachycardia.

Source link: https://doaj.org/article/ff8337a8fc354b0696638ae695f623c5

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions