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July 1, 1982HeartOpen Access

Tachycardia No.2 (narrow QRS, slow pathway) had a longer cycle length (355 ms) than tachycardia No.1 (LBBB, fast pathway, 330 ms) because the AH interval increment compensated for the VA interval decrement.

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Population

1 patient with paroxysmal supraventricular tachycardia

Design

Case_report

Authors

RBRobert A. BauernfeindBSBoris StrasbergKRKenneth M. Rosen

Discussion

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Overview

Reveals rare SVT mechanism with pathway shift; extends EP insights but leaves open clinical relevance.

Structured PICO

P
Population
1 patient with paroxysmal supraventricular tachycardia
I
Intervention
Electrophysiological studies
O
Outcome
Electrophysiological characteristics of tachycardias (cycle length, conduction pathways)surrogate

Demonstrates a rare electrophysiological phenomenon where loss of functional bundle-branch block slows paroxysmal tachycardia due to a shift from fast to slow anterograde AV nodal pathway conduction.

Cite This Study

Bauernfeind et al. (1982) studied this question.

synapsesocial.com/papers/6a20b28e8e09200678d11a08https://doi.org/10.1136/hrt.48.1.75
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