[Possibilities for a complex of corrected orthogenal systems of electro- and vectorcardiograms and the ergometric bicycle test with loading in the diagnosis of the latent form of ischemic heart disease].

The examination was conducted in 100 patients with a cardiac pain syndrome and a normal ECG at rest. Apart from the routine clinical examination, the patients were subjected to ergometric bycycle tests with recording corrected orthogonal electrocardiogrammes and vectorcardiogrammes. All the examined patients were subdivided into 3 groups with reference to their electrocardiographic response to the exercise: group 1 -- 55 persons with physiological changes, group 2 -- 37 persons with pathological changes, and group 3 -- 8 persons with threshold changes on ECG under the exercise. By comparing the vectorcardiogrammes in group 1 and 2 patients vectorcardiographic criteria pathognomonic for ischaemic heart disease were found. With their help the form of the lesion was established in 2 of the 8 patients with threshold changes on ECG under exercises. The method of combined evaluation of ECG and vectorcardiogrammes under exercises. The method of combined evaluation of ECG and vectorcardiogrammes under exercise tests increases their diagnostic potentials in revealing the latent form of ischaemic heart disease.