Midlife systolic blood pressure was significantly higher in subjects with unrecognized myocardial infarction compared to those without MI 31 years later (β=2.69 mm Hg, P=0.04).
Cohort (n=936)
Do midlife cardiovascular risk factors predict unrecognized and recognized myocardial infarction detected by cardiac magnetic resonance 31 years later?
Midlife vascular risk factors, particularly systolic blood pressure, are significantly associated with unrecognized myocardial infarction detected by cardiac magnetic resonance over 30 years later.
BACKGROUND: Associations of atherosclerosis risk factors with unrecognized myocardial infarction (UMI) are unclear. We investigated associations of midlife risk factors with UMI and recognized MI (RMI) detected 31 years later by cardiac magnetic resonance. METHODS AND RESULTS: The Reykjavik Study (1967-1991) collected serial risk factors in subjects, mean (SD) age 48 (7) years. In ICELAND-MI (2004-2007), 936 survivors (76 (5) years) were evaluated by cardiac magnetic resonance. Analysis included logistic regression and random effects modeling. Comparisons are relative to subjects without MI. At baseline midlife evaluation, a modified Framingham risk score was significantly higher in RMI and in UMI versus no MI (7.4 (6.3)%; 7.1 (6.2)% versus 5.4 (5.8)%, P<0.001). RMI and UMI were more frequent in men (65%, 64% versus 43%; P<0.0001). Baseline systolic and diastolic blood pressure were significantly higher in UMI (138 (17) mm Hg versus 133 (17) mm Hg; P<0.006; 87 (10) mm Hg versus 84 (10) mm Hg; P<0.02). Diastolic BP was significantly higher in RMI (88 (10) mm Hg versus 84 (10) mm Hg; P<0.02). Cholesterol and triglycerides were significantly higher in RMI (6.7 (1.1) mmol/L versus 6.2 (1.1) mmol/L; P=0.0005; and 1.4 (0.7) mmol/L versus 1.1 (0.7) mmol/L; P<0.003). Cholesterol trended higher in UMI (P=0.08). Serial midlife systolic BP was significantly higher in UMI versus no MI (β SE = 2.69 1.28 mm Hg, P=0.04). Serial systolic and diastolic BP were significantly higher in RMI versus no MI (4.12 1.60 mm Hg, P=0.01 and 2.05 0.91 mm Hg, P=0.03) as were cholesterol (0.43 0.11 mmol/L, P=0.0001) and triglycerides (0.3 0.06 mmol/L, P<0.0001). CONCLUSIONS: Midlife vascular risk factors are associated with UMI and RMI detected by cardiac magnetic resonance 31 years later. Systolic blood pressure was the most significant modifiable risk factor associated with later UMI.
McAreavey et al. (Tue,) conducted a cohort in Unrecognized and recognized myocardial infarction (n=936). Midlife cardiovascular risk factors vs. Subjects without myocardial infarction was evaluated on Unrecognized myocardial infarction (UMI) and recognized MI (RMI) detected by cardiac magnetic resonance. Midlife systolic blood pressure was significantly higher in subjects with unrecognized myocardial infarction compared to those without MI 31 years later (β=2.69 mm Hg, P=0.04).