[Diagnosis of ischemic heart disease based on the data of precordial mapping]

To improve the efficiency of electrocardiographic diagnosis of coronary heart disease, a search for new meaningful ECG parameters has been carried out, using precordial mapping and automated analysis of the maps. The study included 95 coronary patients, whose diagnosis was verified by visual techniques (coronaroangiography and left ventriculography). ECG-12 showed no signs of past focal/scarry lesions in any of the patients, and detected ischemic changes in 23% only. A group of 95 normal subjects was taken as controls. A classifying function was constructed, using mathematical procedures, stepwise discriminant analysis in particular. Used for the diagnosis of coronary disease, it yielded an 83% sensitivity and an 85% specificity.