title: [Diagnostic value of the electrocardiographic changes during bicycle ergometer loading].
abstract: The diagnostic value of ST-T changes in working ECG on veloergometer with submaximal loading is assessed in 286 cases--83 with coronary disease, 44--healthy, 112 with indistinct precordial pains and neurovegetative dystonia and 46 with some other non-coronary heart diseases. The reduction of ST-segment 1 mm with horizontal or descending form is the most accurate criterium in the differentiation of pathological and normal ECG-reactions. An appropriate criterium for coronary disease diagnosis is also the negative T wave with an amplitude of 2 mm or more in at least three leads, regardless of its form and time of appearance. The reduction of ST segment with ascending form gives a considerable opportunity for positive false diagnosis. The false negative diagnosis is 24%. The causes are to be found in the appearance of rhythm and lead disturbances and insufficient loading.
mesh_terms: D000328:Adult; D000787:Angina Pectoris / Q000175:diagnosis; D003327:Coronary Disease / Q000175:diagnosis; D004562:Electrocardiography; D005080:Exercise Test; D005260:Female; D006331:Heart Diseases / Q000175:diagnosis; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D012146:Rest; D013997:Time Factors
vernacular_title: Diagnostichna stoĭnost na elektrokardiografskite promeni pri veloergometrichno obremeniavane