Noninvasive Measurement of Cardiac Output by Continuous-Wave Doppler Echocardiography: Initial Experience and Review of the Literature

RICK A. NISHIMURA, MARK J. CALLAHAN, HARTZELL V. SCHAFF, DUANE M. ILSTRUP, FLETCHER A. MILLER, A. JAMIL TAJIK

Research output: Contribution to journalArticlepeer-review

95 Scopus citations

Abstract

Doppler echocardiographic measurement of the velocity of blood flow in the ascending aorta is a noninvasive method for determining cardiac output in the critically ill patient. Fifty-four patients in the medical intensive care unit (35 men and 19 women, age range 41 to 91 years) in whom a Swan-Ganz catheter had been inserted underwent measurement of cardiac output with use of a commercially available continuous-wave Doppler echocardiographic instrument. The aortic root diameter was measured by A-mode echocardiography. An additional 26 patients (17 men and 9 women, age range 20 to 83 years) who had undergone an open-heart surgical procedure and had hemodynamic monitoring in the postoperative period also underwent Doppler measurement of cardiac output. In these patients, the aortic root diameter was measured directly intra-operatively. Cardiac output was also determined by thermodilution in both groups. An adequate A-mode study was possible in 83% of the medical patients but only 27% of the surgical patients. Doppler signals were adequate in 84% of the medical patients and 92% of the surgical patients. The correlation between thermodilution and Doppler-derived cardiac output was good in both the medical (r = 0.94, SEE = 0.78, P<0.001) and the surgical (r = 0.85, SEE = 0.78, P<0.001) group. Doppler echocardiography is a promising noninvasive method for determining cardiac output in critically ill patients.

Original languageEnglish (US)
Pages (from-to)484-489
Number of pages6
JournalMayo Clinic proceedings
Volume59
Issue number7
DOIs
StatePublished - Jan 1 1984

ASJC Scopus subject areas

  • Medicine(all)

Fingerprint Dive into the research topics of 'Noninvasive Measurement of Cardiac Output by Continuous-Wave Doppler Echocardiography: Initial Experience and Review of the Literature'. Together they form a unique fingerprint.

Cite this