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[Management of nodal reentrant tachycardia with radiofrequency: predictive criteria of success].

Archives des maladies du coeur et des vaisseaux · 1995 · Benefit · Low evidence

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BenefitLow evidencePaper 4304

All 35 patients had successful procedures with no inducible tachycardia at the end of the procedure. Slow pathway destruction occurred in 20/35 (57%) with no atrioventricular block. Longer A-potential duration, appearance of junctional rhythm, and radiologica…

Study snapshot

PublicationArchives des maladies du coeur et des vaisseaux · 1995
Study typeother
Reported directionBenefit
Evidence ratingLow

Abstract

Endocavitary catheter ablation by radiofrequency energy applied on the slow pathway is an effective method of treatment of nodal reentrant tachycardias. The aim of this report was to determine the criteria predictive of success during radiofrequency ablation of the slow pathway guided by the presence of slow potentials. Thirty-five patients (21 women, 14 men, mean age 44 +/- 14 years) with frequent attacks of junctional tachycardia were studied. After confirmation of the diagnosis by electrophysiological investigation, radiofrequency energy was delivered at a site characterised by the presence of slow potentials between the atrial (A) and ventricular (V) potentials. The criteria investigated at each site were: before application: A/V ratio; amplitude of A and V: maximum A/minimum A ratio; amplitude and duration of the A potential; during ablation: radiological stability of the catheter position and occurrence of a junctional rhythm. All 35 patients had successful procedures with no inducible tachycardia at the end of the procedure. The slow pathway was destroyed in 20 cases (57%) with no complication of atrioventricular block. The duration of the A potential was longer in the successful cases (56 +/- 16 vs 48 +/- 14 ms; p = 0.04). The appearance of junctional rhythm and catheter stability during the procedure were predictive of success (79% vs 48%; p = 0.02; 74% vs 43%; p = 0.01). The authors concluded that an ablation site with a long duration A potential and a slow potential is a good target. In addition, ablation should be started when the catheter is radiologically stable and should not be interrupted in the absence of a junctional rhythm.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeother
Effect directionbenefit
PopulationPatients with frequent attacks of junctional (nodal reentrant) tachycardia undergoing electrophysiological investigation and slow-pathway radiofrequency ablation
Sample size35
ExposureNot supplied
Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

All 35 patients had successful procedures with no inducible tachycardia at the end of the procedure. Slow pathway destruction occurred in 20/35 (57%) with no atrioventricular block. Longer A-potential duration, appearance of junctional rhythm, and radiological catheter stability during ablation were reported as predictive of success.

Outcomes measured

  • Procedural success (no inducible tachycardia at end of procedure)
  • Slow pathway destruction
  • Atrioventricular block complications
  • Predictive criteria of success (A potential duration, junctional rhythm occurrence, catheter stability)
View raw extracted JSON
{
  "study_type": "other",
  "exposure": {
    "band": null,
    "source": "radiofrequency catheter ablation (medical procedure)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Patients with frequent attacks of junctional (nodal reentrant) tachycardia undergoing electrophysiological investigation and slow-pathway radiofrequency ablation",
  "sample_size": 35,
  "outcomes": [
    "Procedural success (no inducible tachycardia at end of procedure)",
    "Slow pathway destruction",
    "Atrioventricular block complications",
    "Predictive criteria of success (A potential duration, junctional rhythm occurrence, catheter stability)"
  ],
  "main_findings": "All 35 patients had successful procedures with no inducible tachycardia at the end of the procedure. Slow pathway destruction occurred in 20/35 (57%) with no atrioventricular block. Longer A-potential duration, appearance of junctional rhythm, and radiological catheter stability during ablation were reported as predictive of success.",
  "effect_direction": "benefit",
  "limitations": [],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "radiofrequency",
    "catheter ablation",
    "slow pathway",
    "AVNRT",
    "nodal reentrant tachycardia",
    "junctional rhythm",
    "electrophysiology",
    "predictors of success"
  ],
  "suggested_hubs": []
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: Not supplied
PubMed: 8729365

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