Frequency of superior vena cava syndrome following radiofrequency modification of the sinus node and its management.

{
  "study_type": "cohort",
  "exposure": {
    "band": null,
    "source": "radiofrequency modification of the sinus node (cardiac ablation)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "35 consecutive patients undergoing radiofrequency modification of the sinus node",
  "sample_size": 35,
  "outcomes": [
    "Superior vena cava syndrome (frequency/risk factors)",
    "Management outcomes: balloon venoplasty vs surgical repair"
  ],
  "main_findings": "In 35 consecutive patients, having a permanent pacemaker appeared to be a strong risk factor for developing superior vena cava syndrome after radiofrequency modification of the sinus node. Balloon venoplasty for this complication was reported to be as effective as surgical repair.",
  "effect_direction": "harm",
  "limitations": [
    "No quantitative effect estimates or event counts provided in the abstract",
    "Study design details (e.g., follow-up duration, comparison groups) not described in the abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.72,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "radiofrequency modification",
    "sinus node",
    "superior vena cava syndrome",
    "permanent pacemaker",
    "balloon venoplasty",
    "surgical repair"
  ],
  "suggested_hubs": []
}