[Gradual evaluation of repolarization disorders with ECG mapping]

143 test persons, (31 healthy persons, 30 borderline cases and 82 patients with chronic coronary heart disease) were examined at rest and on submaximal exertion by means of a mapping ECG (72 electrodes) and their findings were valuated depending upon the severity of the chronic coronary heart disease. The significance of the individual mapping ECG parameters in gradually valuating the disturbances of repolarisation was stated by correlation to the severity of the chronic heart disease and decreased in following order: 1. relative surfaces, 2. total surface with ST decrease in mV, 3. maximum decrease of ST, 4.4. sum of the decrease of ST in mV, 5. sum of negative area integrals of ST and 6. the minimum quotient of increase. The extension of a myocardial ischaemia could be stated with the total area by means of decreases of ST and its maximum by means of the maximal decrease of ST. The severity of the coronary heart disease could be gradually estimated with the "relative surfaces" of the mapping ECG at rest in mild to moderate degrees of severity and under submaximal exertion in all degrees of severity of the coronary heart disease. In a gradual evaluation of the mapping ECG the extension, the intensity, localisation and kind of the disturbance of the myocardium must be considered with regard to the dipole behaviour and to the potential decrease of the cardioelectric field as well as to the degree of severity of the disease.