Document: Heart rate (HR) varied from 44 to 120 bpm (81 AE 17 bpm). BW was a significant predictor for LV dimensions, i.e. M-mode LV diameter and 2D volume in diastole (LVIDD and LVEDV) and systole (LVIDS and LVESV), and mitral valve end point septal separation (EPSS). HR was a significant predictor for FS % (fractional shortening). Predicted values (95% prediction intervals) were calculated from regression models where mean BW (24,7 kg) and age (72 months), and median HR (80 bpm) were used. Normal reference ranges were: LVIDD 46,0 mm (40,0-52,0), LVIDS 33, 4 mm (27, 5) , LVEDV 86,3 ml (64,6-108,0), LVESV 44,2 ml (29,2-59,2), FS%: 27,5% (20,3-34,6), ejection fraction EF%: 48,9% (38,6-59,1), EPSS 7,3 mm (4,4-10,2), sphericity index 1,6 (1,4-1,9), interventricular septum in diastole 10,9 mm (8,6-13,3) and systole 13,8 mm (10,5-17,1), LV free wall in diastole 10,4 mm (8,3-12,4) and systole 13,1 mm (10,0-16,1), left atrial (LA) diameter 28,5 mm (23, 3) , aortic (Ao) diameter 23,9 mm (20,1-27,8) , LA/Ao 1,2 (1,0-1,4), and aortic and pulmonic flow velocity 1,4 m/s (0, 9) and 1,2 m/s (0,8-1,6), respectively.
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