In order to study the informative value of two-dimensional echocardiography (EchoCG) in the assessment of right ventricular function in Fallot's tetrad the results of echocardiography were compared with those of angiocardiography. A total of 40 patients aged 2 to 13 with the cyanotic form of the defect were investigated. Functional indices were calculated using Simpson's rule. The highest correlation in comparing echo- and angiocardiography results was obtained for the end-diastolic volume (r = 0.94), a slightly lower one--for the end-systolic volume (r = 0.92). The mean value of the right ventricular ejection fraction (EF) by the results of echocardiography was 0.62 +/- 0.05 +/- 0.08, by the results of angiocardiography--0.62 +/- 0.05 +/- 0.09. The correlation coefficient characterizing the proximity of EF values, obtained by the above methods, was 0.89. The greatest divergences in the results were noted in the calculation of the minute volume. It can be accounted for by the patients' different state at the time of invasive and non-invasive investigation. A high informative value and accuracy of two-dimensional echocardiography was proved in the assessment of right ventricular function in Fallot's tetrad.
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