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Kaplan–Meier 1-year survival curves based on predicted (by AI-ECG) and observed (by TTE) LVEF ≤35% group. P < 0.001 between either true negative or true positive and all other groups and P = 0.48 for false positive vs. false negative by log-rank. AI-ECG, artificial intelligence-augmented electrocardiogram; ECG, electrocardiogram; LVEF, left ventricular ejection fraction; TTE, transthoracic echocardiogram.
