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Eruptive Calcified Nodules as a Potential Mechanism of Acute Coronary Thrombosis and Sudden Death Association of Thrombus Aspiration With Time and Mortality Among Patients With ST-Segment Elevation Myocardial Infarction: A Post Hoc Analysis of the Randomized TOTAL Trial Predicting Major Adverse Events in Patients With Acute Myocardial Infarction Cardiac Troponin Elevation in Patients Without a Specific Diagnosis Multivessel PCI Guided by FFR or Angiography for Myocardial Infarction Invasive Versus Medical Management in Patients With Prior Coronary Artery Bypass Surgery With a Non-ST Segment Elevation Acute Coronary Syndrome: A Pilot Randomized Controlled Trial Homeostatic Chemokines and Prognosis in Patients With Acute Coronary Syndromes Prevalence of Angina Among Primary Care Patients With Coronary Artery Disease Considerations for Single-Measurement Risk-Stratification Strategies for Myocardial Infarction Using Cardiac Troponin Assays Revascularization Strategies in STEMI with Multivessel Disease: Deciding on Culprit Versus Complete-Ad Hoc or Staged

Clinical Trial2021 Aug 1;152:34-42.

JOURNAL:Am J Cardiol. Article Link

Effect of Lipoprotein (a) Levels on Long-term Cardiovascular Outcomes in Patients with Myocardial Infarction with Nonobstructive Coronary Arteries

SD Gao, WJ Ma, MY Yu Keywords: Lp(a); MINOCA; STEMI; prognostic value; MACE

ABSTRACT

The association between elevated lipoprotein(a) [Lp(a)] and poor outcomes in coronary artery disease (CAD) has been addressed for decades. However, little is known about the prognostic value of Lp(a) in patients with myocardial infarction with nonobstructive coronary arteries (MINOCA). A total of 1179 patients with MINOCA were enrolled and divided into low, medium, and high Lp(a) groups based on the cut-off value of 10 and 30mg/dL. The primary endpoint was major adverse cardiovascular events (MACE), a composite of all-cause death, nonfatal MI, nonfatal stroke, revascularization, and hospitalization for unstable angina or heart failure. Kaplan-Meier and Cox regression analyses were performed. Accuracy was defined as area under the curve (AUC) using a receiver-operating characteristic analysis. Patients with higher Lp(a) levels had a significantly higher incidence of MACE (9.5%, 14.6%, 18.5%; p = 0.002) during the median follow-up of 41.7 months. The risk of MACE also increased with the rising Lp(a) levels even after multivariate adjustment [low Lp(a) group as reference, medium group: hazard ratio (HR) 1.55, 95% confidence interval (CI): 1.02-2.40, p = 0.047; high group: HR 2.07, 95% CI: 1.32-3.25, p = 0.001]. Further, clinically elevated Lp(a) defined as Lp(a) ≥30 mg/dL was closely associated with an increased risk of MACE in overall and in subgroups (all p <0.05). When adding Lp(a) (AUC 0.61) into the Thrombolysis in Myocardial Infarction (TIMI) score (AUC 0.68), the combined model (AUC 0.73) yielded a significant improvement in discrimination for MACE (ΔAUC 0.05, p = 0.032). In conclusion, elevated Lp(a) was strongly associated with a poor prognosis in patients with MINOCA. Adding Lp(a) to traditional risk score further improved risk prediction. Our data, for the first time, confirmed the Lp(a) as a residual risk factor for MINOCA.