[Comparative evaluation of the isometric test and of dynamic exercise in the diagnosis of coronary insufficiency (author's transl)].
Fifty patients with exertional coronary insufficiency performed an exercise test on a bicycle-ergometer and an isometric exercise with an instrument set up by the authors with the collaboration of the technical laboratory of the hospital. All cases had EKG positivity during dynamic exercise and only 2 patients had a positive EKG answer during isometric exercise. Angina occured in 70% of cases during dynamic exercise and in 12% of cases during isometric exercise. The difference in the increasing heart rate of the two types of exercise was statistically significant, as was the difference between absolute values of heart rate reached at the end of the exercise. The difference in the values of arterial pressure reached in the two types of exercise was also statistically significant. Moreover the comparison of product heart rate, time arterial pressure, time 10(-2) bordered on statistical significance. 31 of the 50 patients who underwent coronary angiography, demonstrated severe impairment. During isometric exercise a higher percentage of disturbances was observed. The authors came to the conclusion that isometric exercise is not advisable for the diagnosis of coronary insufficiency, either for the low specificity or the potential risk.
D000328:Adult; D001794:Blood Pressure; D003327:Coronary Disease / Q000175:diagnosis* / Q000503:physiopathology; D004562:Electrocardiography / Q000379:methods*; D005069:Evaluation Studies as Topic; D005080:Exercise Test / Q000379:methods*; D006321:Heart / Q000503:physiopathology; D006339:Heart Rate; D006801:Humans; D007537:Isometric Contraction; D008297:Male; D008875:Middle Aged
Valutazione comparativa dello sforzo isometrico e del lavoro dinamico nella diagnosi dell'insufficienza coronarica