[The objective gradation of stenosing coronary artery processes by means of the quantification of pathologic-anatomical data and their relations. 2. Development and presentation of the model].

: In order to objectify the judgement of the coronary arteriosclerosis the influence values position x obstruction on the left side and on the right side as well as the mass of the heart are mathematically valued with the aim to achieve a good separation between the infarction group and the control group and an insignificant false coordination of test persons. The optimation carried out for this purpose must be brought into accordance by means of technically ascertained recognitions and necessary practicability concerning valuations which are to be proposed. According to the results obtained on 174 test persons an obstruction on the right side below 50% has a higher importance than on the left side. In the positions of the obstruction the proximal as well as the medium third of the right coronary arteries a higher valuation must be ascribed. Compared with this the trunk of the left coronary artery has a significance corresponding possibly to the proximal third of this vessel. A more insignificant importance than hitherto taken into consideration belongs to the medium third of the left coronary artery. The valuations proposed lead to a highly significant improvement of the separation ability in contrast to the comparable valuations. The false coordination of the test persons at the same time decreases to 11 in the group with infarctions and to 2 in the control group. This equals 10.1 or 4.5%, respectively. In the present number of patients the barriers of the ostium and the type of supply have no statistically ascertained influence on the separation ability.