[Determination of cardiac output and ejection fraction using radionuclide angiography. A comparsion with conventional diagnostic methods in cardiology (author's transl)].
Cardiac output and ejection fraction of left and right ventricle were determined in 75 patients with different heart diseases applying a newly developed method which combines radionuclide angiography and triggered blood pool scintigraphy. The comparison of cardiac output and ejection fraction as determined by dye-dilution or thermodilution technique and left ventricular angiography is excellent (coefficient of correlation r equal to 0.86 and r equal to 0.91). Cardiac output and ejection fraction can be determined with this method in single non-invasive operation, i.e. under physiological conditions. The ejection fractions can be determined with high statistical accuracy from time-activity curves of both ventricles. Similar to cine-angiography it is possible to evaluate the ventricular volume, the regional contraction patterns and aneurysmata. Outpatients can be investigated in 30 min. Since the radiation dose in comparison to cine-angiography is very low, this investigation can be repeated several times without harm to the patient. There are no risks as described for cardiac catheterization and contrast angiography. Patients with low cardiac output and ejection fraction can be classified as "high risk patients". In these patients cardiac catheterization can be avoided by applying the described method.
D002302:Cardiac Output; D002306:Cardiac Volume; D006322:Heart Aneurysm / Q000000981:diagnostic imaging; D006352:Heart Ventricles; D006801:Humans; D008722:Methods; D011877:Radionuclide Imaging; D012306:Risk
Radiokardiographische Bestimmung des Herzminutenvolumens und der Ejektionsfraktion. Ein Vergleich mit konventionellen kardiologischen Untersuchungsverfahren.