Low admission LDL-cholesterol is associated with increased 3-year all-cause mortality in patients with non ST segment elevation myocardial infarction

Mouaz Al-Mallah, Hazem Hatahet, João L. Cavalcante, Sanjaya Khanal

Research output: Contribution to journalArticle

33 Scopus citations

Abstract

Background: The relationship between admission low-density lipoprotein (LDL) levels and long-term outcomes has not been established in patients with acute coronary syndrome. We tested the hypothesis that patients who develop non-ST segment elevation myocardial infarction (NSTEMI) despite low LDL have a worse cardiovascular outcome in the long term. Methods: Patients admitted with NSTEMI between 1 January 1997 and 31 December 2000 and with fasting lipid profiles measured within 24 hours of admission were selected for analysis. Baseline characteristics and 3-year all-cause mortality were compared between the patients with LDL above and below the median. Multivariate analysis was used to determine the predictors of all-cause mortality, and adjusted survival was analyzed using the Cox proportional hazard model. Results: Of the total of 517 patients, 264 had LDL ≤ 105 mg/dL and 253 had LDL > 105 mg/dL. There was no difference in age, gender, severity of coronary artery disease, and left ventricular ejection fraction between the 2 groups. Thirty-six percent of patients with LDL ≤ 105 mg/dL and 24% of patients with LDL > 105 mg/dL were on lipid-lowering therapy on admission. After 3 years, patients with admission LDL ≤ 105 mg/dL had higher all-cause mortality rate compared to patients with LDL > 105 mg/dL (14.8% vs. 7.1%, p = 0.005). The higher all-cause mortality persisted (OR 1.8, 95% CI 1.0-3.5, p = 0.05) even after adjustment for confounding variables. Conclusions: In our cohort, lower LDL-cholesterol at admission was associated with decreased 3-year survival in patients with NSTEMI. Whether this was a result of current therapy or a marker for worse baseline characteristics needs to be studied further.

Original languageEnglish (US)
Pages (from-to)227-233
Number of pages7
JournalCardiology Journal
Volume16
Issue number3
StatePublished - Aug 13 2009

Keywords

  • Low-density lipoprotein (LDL) cholesterol
  • Non-ST segment elevation myocardial infarction (NSTEMI)
  • Outcomes

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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