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- W2150816115 abstract "The outcome and suitability for therapeutic interventions in children with congenital heart disease depend frequently on left ventricular function. Congenital heart disease is characterized by changes in loading conditions, making it difficult to assess ventricular contractility using conventional load-dependent indexes. Two-dimensional and M-mode echocardiography and arterial blood pressure were used to study left ventricular morphometrics and contractility in 44 normal children, aged 2 to 12 years. Left ventricular end-systolic and end-diastolic length, diameter, wall thickness, volume and mass all showed linear increases with body surface area (p < 0.001 in all). Shortening and ejection fractions, velocity of circumferential fiber shortening, morphometric ratios and endocardial meridional and circumferential stress (mean 46 and 115 g/cm2, respectively) all remained constant. A load-independent measure of the normal resting left ventricular contractile state was determined by relating the rate-corrected velocity of circumferential fiber shortening to end-systolic endocardial meridional and circumferential stress; there was an inverse linear correlation (r = −0.641 and −0.557 respectively, p < 0.001). These data provide a quantitative basis for assessment of myocardial hypertrophy, afterload and contractile state in childhood." @default.
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- W2150816115 date "1990-02-01" @default.
- W2150816115 modified "2023-10-18" @default.
- W2150816115 title "Normal values for noninvasive estimation of left ventricular contractile state and afterload in children" @default.
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- W2150816115 doi "https://doi.org/10.1016/0002-9149(90)90819-m" @default.
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