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According to a growing body of evidence, the frequency of electrocardiographic (ECG) screening is linearly correlated with the diagnosis of atrial fibrillation (AF), which typically leads to anticoagulation to prevent stroke. However, the threshold density of AF at which the risk for stroke becomes elevated remains unknown. Patients without increased risk for embolic events would face adverse effects from anticoagulation but no benefit. The USPSTF has now published recommendations on ECG screening for AF in older adults along with a separate, exhaustive literature review — 17 studies on 135,000 individuals aged >65 — on the benefits and harms of ECG…