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Echocardiographic data [fractional shortening (FS) (A), ratio of left atrial diameter (LA) and aortic root diameter (Ao) (LA/Ao) (B), left ventricular internal diameter in diastole (LVIDd) (C), and left ventricular internal diameter in systole (LVIDs) (D)] from young sham heart failure (YSHAM), young heart failure (YHF), aged sham heart failure (ASHAM), and aged heart failure (AHF) rats. P < 0.05 vs. age-matched sham groups (*) and vs. young condition-matched groups (†).
