Key result
Early repolarization pattern was associated with a significantly increased risk of sudden cardiac death (HR 1.48; 95% CI 1.08-2.04) and coronary heart disease death over a median 20.1 years.
Why the study?
Cohort studies provide conflicting evidence regarding the prognostic value of early repolarization pattern (ERP) in the general population, complicated by heterogeneous ERP definitions.
Is early repolarization pattern associated with an increased risk of sudden cardiac death and coronary heart disease death in a middle-aged population?
Cohort (n=13,673)
Is early repolarization pattern associated with an increased risk of sudden cardiac death and coronary heart disease death in a middle-aged population?
Hazard Ratio: 1.48 (95% CI 1.08–2.04)
Early repolarization pattern is an independent predictor of sudden cardiac death and coronary heart disease death in a middle-aged population.
ERP may flag higher SCD risk in middle-aged adults; leaves open whether consensus-defined ERP improves risk stratification beyond standard factors.
BACKGROUND: Large cohort studies provide conflicting evidence regarding the prognostic value of early repolarization pattern (ERP) in the general population, complicated by the complex or heterogeneous definitions of ERP applied in different studies. HYPOTHESIS: We hypothesized that ERP was associated with increased cardiovascular risk with the definition of ERP recommended by the expert consensus statements. METHODS: A total of 13673 middle-aged subjects from the prospective, population-based Atherosclerosis Risk in Communities (ARIC) study were included in this analysis. Cox models were used to estimate the hazard ratios (HRs) adjusted for possible confounding factors. ERP was defined as ST-segment elevation ≥0.1mV at the end of the QRS or J wave on the QRS downstroke in two or more contiguous leads. RESULTS: Compared with those without ERP, subjects with ERP had a significantly increased risk of developing sudden cardiac death (SCD) (HR, 1.48; 95% CI, 1.08-2.04) and death from coronary heart disease (CHD) (HR, 1.45; 95% CI, 1.10-1.92) after a median follow-up of 20.1 years. ERP was significantly predictive of SCD in females, whites, younger people, and subjects with relatively low cardiovascular risk. ERP with ST-segment elevation appeared to indicate poor cardiovascular outcomes. ERP was associated with an absolute risk increase of 93.3 additional SCDs per 100 000 person-years. CONCLUSIONS: Our findings suggest that ERP was an independent predictor of SCD and CHD death in the middle-aged biracial population.
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Cheng et al. (2020) conducted a cohort in General population (n=13,673). Early repolarization pattern (ERP) vs. Subjects without ERP was evaluated on Sudden cardiac death (SCD) (HR 1.48, 95% CI 1.08-2.04). Early repolarization pattern was associated with a significantly increased risk of sudden cardiac death (HR 1.48; 95% CI 1.08-2.04) and coronary heart disease death over a median 20.1 years.
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