[Assessment of ejection fraction and left ventricular and diastolic volume by non-invasive methods: echocardiography and isotopic technics. Comparison with angiography in 30 patients]. / L'évaluation de la fraction d'éjection et du volume télédiastolique du ventricule gauche par les méthodes non invasives: échocardiographie et techniques isotopiques. Comparaison avec les données angiographiques à propos de 30 patients.

Three methods of measuring the ejection and the left ventricular end-diastolic volume were compared in 30 consecutive patients (all adults, 3 normal, 3 congestive cardiomyopathy, 6 mixed aortic valve disease, 9 pure aortic stenosis and 9 pure aortic incompetence). The haemodynamic and angiographical data was compared to the results of M-mode echocardiography and gammaangiocardiography. The global results of the ejection fractions were compared: angiography gave the lowest values (0,58 +/- 18). The non-invasive methods gave very similar results (0,67 +/- 15 for the echo and gammaangio). A better correlation was obtained in the group with pure aortic incompetence; the results in pure aortic stenosis were not reliable. The global results of end-diastolic volume showed constant underestimation by the non-invasive methods compared to angiography. The choice of method in each technique may influence the results obtained; each laboratory should determine its normal values; results should not be accepted without a critical assessment. Standardisation of techniques would be desirable.