Key result
Biplane angiocardiography using an ellipsoid reference figure accurately measured left ventricular volume with a standard error of estimate of 2.5 ml.
Biplane angiocardiography using an ellipsoid reference figure provides accurate measurements of left ventricular volume in a canine model.
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Supports experimental LV volumetry in canines; leaves open human translation pending clinical validation.
Casts of the left ventricular cavity were made in 21 canine hearts. Fifty observations were made by means of biplane X-ray films. Left ventricular volume was measured by water displacement and calculated according to six different model analogies. There was good statistical correlation and small error for each of the methods. Method 1, based on the use of the ellipsoid as the reference figure, and using the projected area and the long axis to calculate the transverse diameter, was more accurate than the others. The standard error of estimate with this method was 2.5 ml or approximately 8% at a volume of 30 ml, an average end diastolic volume for a dog weighing 15 kg.
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Sanmarco et al. (1966) studied Left ventricular volume measurement (n=21). Biplane angiocardiography (Method 1) vs. Other model analogies and water displacement was evaluated on Left ventricular volume measurement accuracy (Standard error of estimate 2.5 ml). Biplane angiocardiography using an ellipsoid reference figure accurately measured left ventricular volume with a standard error of estimate of 2.5 ml.
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