Transcutaneous Doppler method of measuring cardiac output—II: Noninvasive measurement by transcutaneous doppler aortic blood velocity integration and M mode echocardiography

• Published in: The American journal of cardiology Vol. 46; no. 4; pp. 613 - 618
• Main Authors: Darsee, John R., Walter, Paul F., Nutter, Donald O.
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.10.1980
• Subjects: Adult; Aged; Aorta; Blood Flow Velocity; Cardiac Catheterization; Cardiac Output; Coronary Care Units; Dopamine - administration & dosage; Doppler Effect; Echocardiography; Female; Humans; Male; Middle Aged; Myocardial Infarction - physiopathology; Physical Phenomena; Physics
• ISSN: 0002-9149; 1879-1913
• DOI: 10.1016/0002-9149(80)90511-1

In 15 patients with acute myocardial infarction (group I) and in 14 patients undergoing routine cardiac catheterization (group II) cardiac output values obtained by multiplying the 1 minute sum of the systolic integral of aortic blood flow velocity by the average systolic diameter of the aortic root were compared with values obtained with the thermodilution and Fick methods, respectively. Patients in group I were studied under various hemodynamic conditions, whereas those in group II were studied in the baseline state only. In group I, the correlation between the two methods was excellent (r values ranged from 0.96 to 0.99) except in one severely anemic patient whose Doppler signals were noisy, but at heart rates exceeding 150 beats/min it was not as good. In group II, the correlation between the two methods was r = 0.96 with a standard error of the estimate of 0.226 liter. The Doppler method is totally noninvasive and is useful for monitoring changes in cardiac output in patients with acute myocardial infarction.