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Linear correlation between systolic fractional shortening in the atrioventricular plane (AVP-FS) (over three months) versus change in radionuclide ejection fraction (EF) (over 12 months) in patients treated with metoprolol. In a multivariate stepwise regression analysis, the AVP-FS was the only echocardiographic variable that was independently associated with the future change in EF: ΔEF % = 12.3 + 0.46(ΔAVP-FS %), r = 0.76, p < 0.001.
