Abstract
Proper of cardiac nucleid-angiography provides parameters which are comparable to those obtained by invasive procedures. Although various methods have been devised for determining left ventricular ejection rate and the geometric analysis of the left ventricle by isotope techniques (Adam 2-5), Ashburn (6, 7), Breuel (11, 12), Strauss/Bill, Strauss/Pitt (65, 66, 67), only a few comparative intra-cavitary pressure measurements are available. Of these, the method developed by de Vernejoul (73 to 76) is of particular importance for measurements during the bolus phase because of the large number of cases studied by simultaneous catheterisation (670 patients). The value of de Vernejoul's formula was confirmed by a study of 350 of our own cases. The disadvantage of the method lies in its susceptibility to variations in the bolus front. We have therefore attempted for some time to obtain pressure measurements by a pooling procedure.
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