Highlight
- A large-scale Chinese cohort study of 273,921 heart failure patients identified a U-shaped association between left ventricular end-diastolic diameter (LVEDD) and mortality.
- Both abnormally small and abnormally large LV dimensions independently predict higher all-cause and cardiovascular mortality.
- Sex-specific LVEDD thresholds (47 mm for men and 43 mm for women) were found optimal for mortality risk stratification.
- Findings support incorporating LV dimension assessment into routine heart failure risk evaluation to guide personalized management.
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