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HDL-cholesterol level provides additional prognosis in acute coronary syndromes

Luís C L Correia1, Mário S Rocha, J Péricles Esteves

  • 1Portuguese Hospital, Salvador/BA, Brazil. lccorreia@terra.com.br

International Journal of Cardiology
|August 19, 2008
PubMed

Insights

High-density lipoprotein (HDL) cholesterol, unlike LDL cholesterol and triglycerides, independently predicts in-hospital events in acute coronary syndromes. Lower HDL levels (< or =32 mg/dl) significantly increase event risk, improving prognostic models.

Area of Science:

  • Cardiology
  • Clinical Lipidology

Background:

  • Plasma lipid profiles are not well-established prognostic variables in acute coronary syndromes (ACS).
  • Limited research exists on the specific predictive value of lipids for in-hospital events in ACS patients.

Purpose of the Study:

  • To evaluate the independent predictive value of low-density lipoprotein (LDL)-cholesterol, high-density lipoprotein (HDL)-cholesterol, and triglycerides for in-hospital events.
  • To determine if HDL-cholesterol improves existing risk scores for ACS.

Main Methods:

  • Assessed 97 patients with unstable angina or non-ST-elevation acute myocardial infarction.
  • Measured plasma lipids (LDL-C, HDL-C, triglycerides) at hospital admission.
  • Analyzed in-hospital events (death, MI, recurrent unstable angina) using logistic regression and C-statistics.

Main Results:

  • HDL-cholesterol significantly predicted in-hospital events (C-statistic=0.69, P=0.018), unlike LDL-cholesterol and triglycerides.
  • An HDL-cholesterol cut-off of 32 mg/dl identified higher-risk patients (33% event incidence vs. 9%, P=0.003).
  • HDL-cholesterol < or =32 mg/dl (OR=3.6) and TIMI Risk Score (OR=2.3) were independent predictors; adding HDL-C improved the TIMI score's C-statistic from 0.81 to 0.85.

Conclusions:

  • HDL-cholesterol level provides independent prognostic value for predicting in-hospital recurrent events in non-ST-elevation ACS.
  • LDL-cholesterol and triglycerides did not show significant predictive value in this cohort.
  • Incorporating HDL-cholesterol into risk stratification tools like the TIMI Risk Score enhances predictive accuracy for ACS patients.

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