Isolated Atrial Lead Conduction Delay following Right Atrial Radiofrequency Maze Procedure.

{
  "study_type": "case_report",
  "exposure": {
    "band": null,
    "source": "radiofrequency maze procedure (right atrial ablation lines)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "60-year-old man with a dual-chamber implantable cardioverter defibrillator and apical hypertrophic cardiomyopathy",
  "sample_size": 1,
  "outcomes": [
    "atrial sensing delay",
    "iatrogenic atrial conduction delay",
    "sensing or pacing malfunction considerations"
  ],
  "main_findings": "After septal myectomy and a radiofrequency maze procedure, a persistent delay in atrial sensing was observed, most likely due to iatrogenic conduction delay from right atrial ablation lines. The report suggests atrial conduction properties can be altered during surgical maze procedures and may contribute to apparent sensing/pacing malfunction.",
  "effect_direction": "harm",
  "limitations": [
    "Single-patient case report",
    "No radiofrequency exposure parameters (e.g., frequency, power, duration) reported",
    "Causality inferred as most likely; no confirmatory testing described in abstract"
  ],
  "evidence_strength": "very_low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "radiofrequency maze",
    "right atrial ablation",
    "atrial lead",
    "conduction delay",
    "atrial sensing",
    "implantable cardioverter defibrillator",
    "hypertrophic cardiomyopathy"
  ],
  "suggested_hubs": []
}