[Diagnosis of coronary artery lesions during the exercise test according to electrocardiotopographic data in patients with ischemic heart disease].

It has been shown that electrocardiotopography applied during the exercise test in patients with coronary heart disease makes the test more sensitive without changing its specificity as compared with the ECG in common 12 leads. The depression of the ST segment occurs on the electrocardiotopogram in the areas of the precardial zone, corresponding to an isolated or pair lesion of the definite coronary arteries. Upon the involvement of all the three main arteries of the heart the site of the depression is indefinite, but its degree rises, being maximal in patients with stenosis of the left coronary artery and right coronary artery. In these patients, the displacement of this segment spreads to all the areas of the precardial zone.