Atrio‐Hisian block precludes preexcitation—What is the mechanism?

[...]more preexcitation, a larger delta wave and a broader QRS complex are noted when there is an AVP. Pacing manoeuvres that increase preexcitation and shorten the HV interval in AVP fail to do so in FVP as it occurs distal to the AVN. [...]incremental atrial pacing which relies on faster pacing ra...

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Bibliographic Details
Published in:Journal of arrhythmia 2018-12, Vol.34 (6), p.659-660
Main Authors: Prabhu, Mukund Aravind, Shekhar, Saritha, Pai, Praveen, Natarajan, Kumaraswamy Umayammal
Format: Article
Language:English
Subjects:
accessory pathway
Adenosine
atriohisian block
Cardiac arrhythmia
Catheters
Electrocardiogram
Electrocardiography
Eps for Resident Physicians
fasciculoventricular
Heart rate
Medical screening
preexcitation
superoparaseptal
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Description
Summary:[...]more preexcitation, a larger delta wave and a broader QRS complex are noted when there is an AVP. Pacing manoeuvres that increase preexcitation and shorten the HV interval in AVP fail to do so in FVP as it occurs distal to the AVN. [...]incremental atrial pacing which relies on faster pacing rate to increase preexcitation, pacing from multiple sites which relies on increased preexcitation while pacing closer to the site of atrial insertion site of the AVP all yield a constant degree of preexcitation in FVP. [...]preexcitation FVP may cause intermittent preexcitation though the exact mechanism is unknown.
ISSN:1880-4276
1883-2148
DOI:10.1002/joa3.12117