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Validation and Adjustment of the Leipzig-Halifax Acute Aortic Dissection Type A Scorecard

Hanna Mejàre-Berggren1, Christian Olsson1

  • 1Department of Molecular Medicine and Surgery, Cardiovascular Surgery Unit, The Karolinska Institute and Karolinska University Hospital, Stockholm, Sweden.

The Annals of Thoracic Surgery
|July 29, 2017
PubMed

Insights

The Leipzig-Halifax (LH) scorecard for acute aortic dissection type A (AADA) was validated and improved by including Penn class non-Aa, enhancing its prognostic performance for in-hospital death prediction.

Area of Science:

  • Cardiovascular Surgery
  • Thoracic Surgery
  • Aortic Surgery

Background:

  • The Leipzig-Halifax (LH) scorecard is a risk stratification tool for acute aortic dissection type A (AADA).
  • It predicts in-hospital mortality based on age, malperfusion, critical state, and coronary disease.
  • External validation is crucial to assess and potentially refine its performance.

Purpose of the Study:

  • To externally validate the performance of the Leipzig-Halifax (LH) scorecard for acute aortic dissection type A (AADA).
  • To propose adjustments to the LH scorecard to improve its prognostic accuracy if validation indicates inadequacy.

Main Methods:

  • External validation cohort of 509 consecutive AADA patients operated on between 1996 and 2016.
  • Univariable and multivariable analyses identified predictors of in-hospital death.
  • LH scorecard applied to the validation cohort; variable selection adjusted based on discrimination and calibration measures.

Main Results:

  • In-hospital mortality was 17.7%. Critical preoperative state and Penn class non-Aa were independent predictors of death.
  • An adjusted scorecard including Penn class non-Aa, critical preoperative state, and coronary disease showed improved discrimination (AUC 0.66 vs. 0.61) and calibration (goodness-of-fit p=0.86 vs. 0.01).
  • The adjusted scorecard demonstrated better risk stratification across low, medium, and high-risk groups.

Conclusions:

  • External validation and subsequent adjustment of the LH scorecard improved its prognostic performance.
  • The refined LH scorecard shows potential as a valuable tool for risk prediction in AADA patients.
  • Further validation is recommended to solidify its clinical utility.
Abstract

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