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Robotic Ablation of Atrial Fibrillation
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Cardioversion safety in patients with nonvalvular atrial fibrillation: which patients can be spared transesophageal

Rui Providência1, Ana Faustino, Luís Paiva

  • 1Cardiology Department, Coimbra's Hospital Centre, University of Coimbra, Coimbra, Portugal. rui_providencia@yahoo.com

Blood Coagulation & Fibrinolysis : an International Journal in Haemostasis and Thrombosis
|July 5, 2012
PubMed

Insights

A new CATES score accurately predicts left atrial appendage thrombus (LAAT) in nonvalvular atrial fibrillation patients. This score helps identify individuals who may avoid transesophageal echocardiogram (TEE) and undergo safe cardioversion.

Area of Science:

  • Cardiology
  • Medical Diagnostics
  • Clinical Prediction Models

Background:

  • Left atrial appendage thrombus (LAAT) is a risk factor for stroke in nonvalvular atrial fibrillation (NVAF).
  • Transesophageal echocardiogram (TEE) is often used to detect LAAT before cardioversion, but it is invasive and costly.
  • Predictive tools are needed to identify NVAF patients who can safely forgo TEE.

Purpose of the Study:

  • To derive and validate the CATES score for predicting LAAT in NVAF patients.
  • To identify a low-risk group of patients who may be spared TEE.
  • To improve the safety and efficiency of cardioversion in NVAF.

Main Methods:

  • Cross-sectional observational study of 180 NVAF patients.
  • Clinical, echocardiographic, and laboratory evaluations, including cardiac troponin I and C-reactive protein (CRP).
  • TEE was used to detect LAAT; predictors were assessed to derive the CATES score. Receiver operating curve analysis was used for accuracy testing.

Main Results:

  • LAAT was present in 9.4% of patients.
  • The CATES score demonstrated high accuracy (AUC 0.816) for LAAT prediction, outperforming CHADS2 and CHA2DS2-VASc scores.
  • No LAAT was observed in patients with CATES scores of 0-2 (49.4% of the sample), indicating a very low-risk group.

Conclusions:

  • The CATES score is a highly accurate tool for predicting LAAT in NVAF patients.
  • The CATES score can potentially identify a significant proportion of patients who can be safely spared TEE.
  • Further validation in larger, diverse populations is warranted to confirm the score's clinical utility.

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