The predictive value of complete blood count-derived indices for major adverse cardiovascular events in MINOCA patients at 5-year follow-up

Introduction: The authors analysed the potential of red blood cell and platelet indices such as red cell distribution width (RDW), mean corpuscular volume (MCV), and mean platelet volume (MPV) as predicting factors in myocardial infarction with non-obstructive coronary arteries (MINOCA) patients of 5-year outcomes. Material and methods: Between 2010–2015 were identified 112 patients who had final MINOCA diagnosis and available laboratory findings. The primary endpoint was the 5-year major adverse cardiovascular events rate, defined as cardiac death, myocardial infarction, or hospitalization due to angina. Results: Only RDW had a significant impact on long-term outcomes. 93 (83%) patients had RDW ≤ 14.5 (group 1), and 19 (17%) patients had RDW > 14.5 (group 2). The mean RDW value was 13.58 ± 1.11%. In group 1 and group 2, mean RDW values were 13.18 ± 0.55%, and 15.54 ± 1.06% (p < 0.001), respectively. Patients with abnormal RDW values (group 2) characterized lower value of left ventricular eject fraction (60 ± 8% vs. 53 ± 13%, p = 0.024), and higher NT-proBNP values (3,170 ± 5,285 pg/mL vs. 6,200 ± 4,223 pg/mL, p = 0.013) as well as troponin levels (501–2500 ng/mL: 31% vs. 53%, p = 0.02). A statistically significant difference was observed only for all-cause death. All-cause death rates for no RDW ≤ 14.5% vs. RDW > 14.5% were 2.2% vs. 21.1% (HR 5.09, 95% CI 1.03–25.2, p = 0.046), respectively. Conclusions: RDW was significantly associated with the increased risk of all-cause mortality in MINOCA patients at 5 years.