P1559Frailty is an independent predictor of one-year mortality in patients with ST-segment elevation myocardial infarction, regardless of age, clinical severity and left ventricular function

Abstract

Background Frailty is characterized by decline in physiologic reserve and function leading to increased vulnerability. Sarcopenia, one of its features, has been associated with cardiac dysfunction. Purpose Assess frailty-based mortality in ST-segment elevation myocardial infarction (STEMI) patients following primary angioplasty. Methods Retrospective cohort of 427 consecutive STEMI patients (64 years [55–75]; 78% men) admitted to a general ICU between November-2013 and February-2017. We assessed frailty with the Clinical Frailty Scale (CFS). We used Kaplan-Meier and Cox regression models for survival analysis, stratified by CFS score categories (Figure). For clinical relevance, patients were dichotomized in robust (CFS 1–3) and vulnerable (CFS ≥4). Results Vulnerable patients were older, had more comorbidities and a higher GRACE 2.0. They had lower CK and albumin levels and higher BNP levels, despite the lack of frailty-based differences in LVEF and MI size and location. One-year mortality rate was higher in vulnerable patients (Table). After Cox regression analysis, vulnerable patients (CFS ≥4) showed a 3.37-fold higher risk of one-year mortality than robust ones (95% CI, 1.59–7.15; P=0.002), independently of age, gender, GRACE 2.0 or LVEF. Baseline characteristics Vulnerable (CFS ≥4) Robust (CFS 1–3) P value (n=60) (n=367) One-year mortality, n (%) 15 (25) 14 (4.1) <0.001 Age (years) 78 [67–85] 61 [54–72] <0.001 Gender (women), n (%) 28 (46.7) 65 (17.7) <0.001 Hypertension, n (%) 47 (78.3) 156 (42.5) <0.001 Diabetes mellitus, n (%) 31 (51.7) 79 (21.5) <0.001 GRACE 2.0 150 [129–170.8] 112 [93–136] <0.001 Left ventricular ejection fraction (%) 52 [40–60] 55 [45–60] 0.151 MI location (anterior), n (%) 26 (43.3) 168 (45.8) 0.781 Creatin-phosphokinase (UI/L) 921 [286.8–2072] 1496 [607–2786] 0.011 High-sensitivity troponin I (pg/mL) 3699.5 [38–47968.1] 8789.8 [65.8–61970] 0.537 B-natriuretic peptide (pg/mL) 267.9 [117.3–901.6] 104.3 [29.5–268.7] <0.001 Albumin (g/L) 34.9 [32.8–37.4] 38.4 [35.7–40.4] <0.001 Kaplan-Meier and Cox survival curves. Conclusions Frailty is an independent predictor of one-year mortality in STEMI patients, independently of age, clinical severity and ventricular function. Frailty assessment should be routinely included in the clinical examination and decision-making process of STEMI patients.