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Robotic Ablation of Atrial Fibrillation
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Risk Factors for Ischemic Stroke in Atrial Fibrillation Patients Undergoing Radiofrequency Catheter Ablation

Yun Gi Kim1, Jaemin Shim2, Suk-Kyu Oh1

  • 1Arrhythmia Center, Korea University Medical Center Anam Hospital, Seoul, Republic of Korea.

Scientific Reports
|May 9, 2019
PubMed

Insights

Ischemic stroke risk after radiofrequency catheter ablation for atrial fibrillation is linked to factors like age, AF type, and heart structure. A new REVEEAL score better predicts stroke risk than the CHA2DS2-VASc score in these patients.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Neurology

Background:

  • Ischemic stroke following radiofrequency catheter ablation (RFCA) in atrial fibrillation (AF) patients presents a significant clinical challenge.
  • Identifying patients at higher risk is crucial for effective stroke prevention strategies.

Purpose of the Study:

  • To evaluate clinical and echocardiographic characteristics associated with an increased risk of ischemic stroke post-RFCA in AF patients.
  • To compare the predictive performance of a novel REVEEAL score against the established CHA2DS2-VASc score for post-RFCA ischemic stroke.

Main Methods:

  • Retrospective analysis of 2,352 consecutive patients with AF undergoing their first RFCA.
  • Long-term follow-up (10,023 patient-years) to identify ischemic stroke events.
  • Statistical analysis to determine risk factors and compare scoring systems.

Main Results:

  • The incidence of ischemic stroke was 0.49% per year.
  • Significant risk factors included late recurrence after RFCA, older age (≥60), non-paroxysmal AF, larger left atrium (LA) size (≥45.0 mm), elevated E/E' (≥10), dense spontaneous echo contrast (SEC), and reduced left atrial appendage (LAA) flow velocity (≤40 cm/sec).
  • The REVEEAL score demonstrated superior predictive accuracy for ischemic stroke compared to the CHA2DS2-VASc score (p < 0.001).

Conclusions:

  • The risk factors for ischemic stroke in AF patients after RFCA differ from those in RFCA-naive patients.
  • A distinct approach to risk stratification is necessary for post-RFCA AF patients.
  • The REVEEAL score offers improved prediction of ischemic stroke in this population.

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