ABSTRACT
Seventy-eight simultaneous studies of the stroke volume value by the method of dye dilution and by echography were conducted in 28 males on the first to tenth day of macrofocal myocardial infarction. Despite the satisfactory correlation of the stroke volume values obtained by both methods in the whole group (r=0.71), the authors note a difference in the correlation depending on the localization of infarction and the kinetic condition of the diseased and the intact zones. The authors believe that the echocardiogrphic method is not reliable in determining the volumetric values in patients with macrofocal myocardial infarction since it misrepresents the true value of the stroke volume though it reflects the general trend of changes in the hemodynamic indices. Echocardiography yields essential supplementary information on the state of the left ventricular pumping function and the mechanisms of its compensation in the acute period of myocardial infarction.
Subject(s)
Cardiac Output , Dye Dilution Technique , Echocardiography , Myocardial Infarction/physiopathology , Acute Disease , Aged , Evaluation Studies as Topic , Humans , Indocyanine Green , Male , Middle Aged , Myocardial Infarction/diagnosis , Stroke VolumeABSTRACT
Study of hemodynamics did not disclose any sole criterion for determining the optimum frequency of electric stimulation of the heart in the IV degree atrioventricular block in patients with acute myocardial infarction. Only a complex of indices serves the purpose, among which the first and foremost is the patient's general condition appraised by means of the routine physical methods and, whenever possible, by measuring the cardiac minute volume and the central venous pressure. The necessary frequency of electric stimulation in the prevention of arrhythmia should be chosen empirically.
