[Direct and non-invasive determination of cardiac volume]. / Direkte und nicht-invasive Bestimmung des Herzzeitvolumens.

An improved isotope method for direct and non-invasive determination of heart volume, ejection volume and volume/time is described. By taking account of the reduction in the radio-active marker during the procedure, very good correlation of the results with those of cine ventriculography carried out at the same time can be expected.