February 1, 2000Pacing and Clinical Electrophysiology
Orthodromic Tachycardia with Atrioventricular Dissociation: Evidence for a Nodoventricular (Mahaim) Fiber
Key result
Ventricular extrastimulation induced two tachycardias with AV dissociation, suggesting the presence of a nodoventricular (Mahaim) bypass tract.
Population
1 patient with inducible tachycardias with AV dissociation
Design
Case_report
Authors
Discussion
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Implication
Hypothesis-generating for nodoventricular reentry in AV-dissociated tachycardias; prospective studies needed before diagnostic or ablation changes.
Study Design
Type
Case Report (n=1)
Structured PICO
P
Population
1 patient with orthodromic tachycardia with atrioventricular dissociation undergoing electrophysiological study.
E
Exposure
Ventricular extrastimulation and propafenone infusion
O
Outcome
Electrophysiological characteristics of the induced tachycardiassurrogate
The case provides electrophysiological evidence for a nodoventricular (Mahaim) fiber involved in orthodromic tachycardia with AV dissociation.
Limitations
- A ventricular tachycardia cannot be excluded for the second tachycardia.
Cite This Study
Mantovan et al. (2000) conducted a case report in Orthodromic Tachycardia with Atrioventricular Dissociation (n=1). Ventricular extrastimulation and propafenone infusion was evaluated on Tachycardia characteristics and inducibility. Ventricular extrastimulation induced two tachycardias with AV dissociation, suggesting the presence of a nodoventricular (Mahaim) bypass tract.