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March 1, 1990Pacing and Clinical Electrophysiology

Cycle Length Alternation During Supraventricular Tachycardia: Occurrence and Mechanism in a Canine Model of AV Reentrant Tachycardia

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Population

11 open-chested, autonomically-blocked (atropine plus nadolol) dogs

Comparison

Orthodromic AV reentrant tachycardia created… vs Computer simulations of tachycardia and abrupt…

Design

Preclinical

Authors

MTMario TalajicElectrophysiologyCVC VillemaireMontreal Heart InstituteDPD PapadatosUniversity of Ottawa

Discussion

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Implication

May indicate AV nodal feedback in short-VA AVRT onset in animals; leaves open human circuit confirmation.

Structured PICO

P
Population
11 open-chested, autonomically-blocked (atropine plus nadolol) dogs
I
Intervention
Orthodromic AV reentrant tachycardia (AVRT) created experimentally using a sensing and pacing circuit mimicking a retrograde-conducting accessory pathway
C
Comparator
Computer simulations of tachycardia and abrupt accelerations in atrial pacing
O
Outcome
Occurrence, amplitude, and duration of cycle length alternation (CLA)surrogate

Alternation of cycle length results from feedback between AV nodal output and subsequent AV nodal input at the onset of reentrant SVT, suggesting the AV node is an integral component of the SVT reentry circuit.

Cite This Study

Talajic et al. (1990) studied this question.

synapsesocial.com/papers/6a20b25c4a00abbd10d116cfhttps://doi.org/10.1111/j.1540-8159.1990.tb02045.x
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Stability of an experimental atrioventricular reentrant tachycardia in dogs1981 · 28 citations
  2. 2Short time constant for rate-dependent changes of atrioventricular conduction in dogs1981 · 36 citations
  3. 3Electrophysiological Studies on Preexcitation in the Dog Using an Electronically Simulated Atrioventricular Bypass Pathway1972 · 27 citations
  4. 4Prediction of complex atrioventricular conduction rhythms in humans with use of the atrioventricular nodal recovery curve.1987 · 122 citations
  5. 5The role of an accessory atrioventricular pathway in reciprocal tachycardia. Observations in patients with and without the Wolff-Parkinson-White syndrome.1975 · 289 citations