Heart Rate, Electrocardiographic Subclinical Myocardial Injury, and Long-Term Mortality

Of note, unadjusted Kaplan–Meier curves for CV mortality did not reach statistical significance across heart rate groups (log-rank p = 0.29), likely reflecting both the relatively small tachycardia subgroup with limited event counts and confounding by age and comorbidity burden that obscured the underlying association.

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