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• W2079889092 abstract "To assess the utility of double oblique, ECG-gated 1H magnetic resonance (MR) derived volume curves for assessing LV function, cardiac short axis images were acquired with a fast field echo technique. We applied this methodology to assess left ventricular function in three groups: normals, patients with left ventricular hypertrophy, and dilated cardiomyopathy. Six slices with 16–20 phases per RR interval were analyzed, representing the initial 75–80% of the cardiac cycle. For each slice, the endocardial border of the left ventricular (LV) chamber was manually traced. Using Simpson's rule, the total LV volume at a given phase was determined considering the traced area, thickness and position in three-dimensional space of each of the six constituent slices. The calculated volumes were plotted against time and the stroke volume, ejection fraction and cardiac output were determined. The volume vs time plots for the systolic and diastolic portions of the curve were individually fit to third degree polynomials using a least squares approximation. From the fit curves, the following data were extracted: the mean slope (dVdT) during filling and emptying, and the time to 14, 13 and 12 filling and emptying. These parameters are valuable indices of the functional status of the myocardium; thus, accurate and useful estimates of LV function can be obtained using MRI derived volume curves in normal and abnormal states." @default.
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• W2079889092 date "1994-01-01" @default.
• W2079889092 modified "2023-10-13" @default.
• W2079889092 title "MRI-derived ventricular volume curves for the assessment of left ventricular function" @default.
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• W2079889092 doi "https://doi.org/10.1016/0730-725x(94)92195-4" @default.
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