title: [Study of informative value of functional tests for identification of negative ECG T-waves with the use of mathematical analysis].
abstract: The informativeness of functional tests and of their combinations was studied with reference to the differential diagnosis of the functional or organic genesis of the repolarization ECG changes. The highest informativeness was found to be achieved with the potassium and Inderal tests that permit to establish unequivocally a functional or organic genesis. A combination of the potassium and Inderal tests significantly increases the informativeness of each of these tests taken separately. The Valsalva and the orthorstatic tests are practicallt noninformative in terms of the conducted study.
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004087:Dihydroergotamine; D004562:Electrocardiography; D005069:Evaluation Studies as Topic; D005260:Female; D006321:Heart / Q000503:physiopathology; D006331:Heart Diseases / Q000175:diagnosis* / Q000503:physiopathology; D006334:Heart Function Tests / Q000379:methods*; D006801:Humans; D008297:Male; D008433:Mathematics; D008875:Middle Aged; D011187:Posture; D011189:Potassium Chloride; D011433:Propranolol; D014636:Valsalva Maneuver
chemical_list: D004087:Dihydroergotamine; D011189:Potassium Chloride; D011433:Propranolol
vernacular_title: Izuchenie informativnosti funktsional'nykh prob dlia identifikatsii otritsatel'nykh zubtsov T EKG (s primeneniem matematicheskogo analiza