[Comparative characteristics of the diagnostic methods in silent myocardial ischemia].

This part of the work contains the results of the comparative analysis of the graded physical loading (GFL) and Holter electrocardiogram monitoring (HEM) data. A silent false-negative depression of ST-segment during HEM was observed only in 2.5-8% of all investigated patients. It was established that the use of tests with GFL, HEM and hyperventilation allowed diagnosing more patients with silent myocardial ischemia as well as ST-segment dislocations have been seen in 97.2% cases. 9.1% of clinically healthy patients with risk factors and ST-segment depression were shown by means of myocardial scintigraphy with 201-T1 contrast. 50% of examined patients had silent ST-segment depression after psycho-emotional stress-tests. The comparison of the results of HEM and stress-tests showed that a ST-segment shift was more distinct in patients with episodes of symptomatic and silent myocardial ischemia than in those with silent myocardial ischemia. The article presents findings concerning the rate of ST-segment changes after the GEL test in recovery period. 5 types of ST-segment shift were distinguished.