[Improvement of computerized biplane integration method for left ventricular volume determination by variation of long axis insertion (author's transl)].

Biplane integration method for left ventricular volume determination is applicable to routine work since digital contour memories, calculation of the cross-section area and summation of all volume slices are computerized. The longest measured axis is recommended for volume calculation. A second calculation with interchanged axis and averaging of both results led to a correlation coefficient (r) of 0.997 (comparison of true volume and calculated volume). Comparison of stroke volume in patients with coronary heart disease determined by the Fick principle and the reported method showed a significantly better correlation for the biplane than for the monoplane method.