[Quantification of left ventricular function by subtraction intravenous angiography].
Digitised intravenous angiography (Diva), initially applied to the study of the aorta and great vessels, has benefited from technical advances, especially the possibility of recording 25 frames per second, which now allows studies of the heart itself. 22 subjects underwent angiography with digitised subtraction after injection of 50 ml of sodium diatrizoate and meglumine in the right atrium and selective left ventriculography in the same catheter session. The end diastolic and systolic indices and global ejection fractions were measured independently for each technique by Chapman's method by two observers. The model of digitised angiography used was a CGR Divas prototype functioning in the pulsed graphic mode at 25 images per second. The results showed that the Diva method gave reproducible values of the end diastolic index (101 +/- 29.8 and 104.5 +/- 30.7: r = 0.98), of the end systolic index (43.2 +/- 32.9 and 44.6 +/- 32.5; r = 0.98), and of the ejection fraction (62.5 +/- 17.16 p. 100 and 62.17 +/- 15.7 p. 100; r = 0.96). There was a close correlation between the results of Diva and selective ventriculography (end diastolic index: 97.8 +/- 21.1 and 101.6 +/- 10.3; r = 0.87; end systolic index: 38.82 +/- 24.8 and 43.9 +/- 21.17; r = 0.95; ejection fraction: 62.12 +/- 16.27 and 57.29 +/- 15.53; r = 0.95). There was a significant underestimation of the end systolic index using Diva (0.01 less than p less than 0.02). The originality of the pulsed graphic method is the totally digitised character of the data.(ABSTRACT TRUNCATED AT 250 WORDS)
D000328:Adult; D000368:Aged; D000792:Angiography / Q000295:instrumentation; D017023:Coronary Angiography; D005260:Female; D006321:Heart / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013382:Subtraction Technique
Quantification de la fonction du ventricule gauche par angiographie numérique par voie veineuse.