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Primary endpoint by etiology and SRS Kaplan-Meier curves for the primary endpoint stratified by HF etiology and SRS. Patients with a nonischemic etiology and a low SRS had the lowest event rate. Those with a high SRS, regardless of etiology, had similar event rates, with the subjects with nonischemic HF having slightly higher rates. Patients with an ischemic etiology and a low SRS had the highest event rate, likely from a high underlying ischemic burden.
