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[Double responses]

G Motté1, S Dinanian, C Sebag

  • 1Faculté de médecine Paris-Sud, Hôpital Antoine-Béclère, Clamart.

Archives Des Maladies Du Coeur Et Des Vaisseaux
|December 1, 1995
PubMed
Summary
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Double ventricular responses, a rare electrocardiographic finding, involve two distinct atrioventricular pathways. This phenomenon can trigger symptomatic tachycardia, sometimes necessitating slow pathway ablation.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Cardiac Electrophysiology

Context:

  • Double response is a rare electrocardiographic phenomenon.
  • Requires two atrioventricular conduction pathways with distinct electrophysiological properties.
  • Often observed during electrophysiological investigation of Wolff-Parkinson-White syndrome.

Purpose:

  • To describe the mechanism and clinical implications of double ventricular responses.
  • To highlight the association with symptomatic non-reentrant junctional tachycardia.
  • To discuss treatment strategies including slow pathway ablation.

Summary:

  • Double ventricular responses occur when an atrial depolarization triggers two sequential ventricular activations via separate atrioventricular pathways.

Related Experiment Videos

  • The first response uses a rapid pathway (accessory or nodal), while the second utilizes a delayed nodal pathway after ventricular recovery.
  • When linked with nodal duality, this can initiate symptomatic junctional tachycardia, particularly in patients with Wolff-Parkinson-White syndrome.

    • Impact:

    • Understanding double responses is crucial for diagnosing and managing certain cardiac arrhythmias.
    • Identifies a specific mechanism that can lead to drug-refractory symptomatic tachycardia.
    • Suggests slow pathway ablation as a potential therapeutic option for refractory cases.