18.118.126.5118.118.126.5118.118.126.51 Retrograde ventriculoatrial jump-What is the mechanism? | LitMetric

Retrograde ventriculoatrial jump-What is the mechanism?

J Arrhythm

Department of Cardiology Medica Superspeciality Kolkata India.

Published: August 2023

During ventricular extra stimuli(VES) protocol a VA jump was noted. In upper panel with VES @ 500/270 ms (Fig A) the His signal appeared after the A-EGM, ruling out pure nodal VA conduction and confirming presence of an accessory pathway (AP). The H signal was delayed due to probable retrograde RBBB. The atrium was already depolarised via AP and the VA traversing via left bundle-His-node got blocked with a H signal. In the lower panel with VES of 500/260 ms the retrograde AP conduction reached the effective refractory period and pure nodal VA conduction took place along with retrograde RBBB. The retrograde VA jump was hence due to a jump from AP to AV node.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10407172PMC
http://dx.doi.org/10.1002/joa3.12873DOI Listing

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View Article and Find Full Text PDF

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