Cardiac Output Estimation With a New Doppler Device After Off-Pump Coronary Artery Bypass Surgery

• Published in: Journal of cardiothoracic and vascular anesthesia Vol. 20; no. 3; pp. 315 - 319
• Main Authors: Chand, Rajesh, Mehta, Yatin, Trehan, Naresh
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.06.2006
• Subjects: Adult; Aged; Cardiac Output; continuous-wave Doppler; Coronary Artery Bypass, Off-Pump; Female; Humans; Male; Middle Aged; Monitoring, Physiologic - instrumentation; noninvasive cardiac output; noninvasive hemodynamic monitoring; OPCAB; Prospective Studies; Stroke Volume; Thermodilution; thermodilution technique; Ultrasonography, Doppler; USCOM; thermodilution technique; noninvasive hemodynamic monitoring; continuous-wave Doppler; OPCAB; USCOM; noninvasive cardiac output
• ISSN: 1053-0770; 1532-8422
• DOI: 10.1053/j.jvca.2005.05.024

Objective: To compare cardiac output (CO), stroke volume (SV), and cardiac index (CI) as estimated with a new, noninvasive Doppler device (Ultrasonic Cardiac Output Monitor [USCOM]; USCOM Ltd, Sydney, Australia) with those measured with the bolus thermodilution (TD) technique. Design: Prospective nonrandomized study. Setting: Postcardiac surgery recovery unit of a tertiary cardiac center. Participants: Fifty patients after off-pump coronary artery bypass (OPCAB) surgery. Measurement and Main Results: Both right-sided and left-sided CO were estimated with a USCOM continuous-wave (CW) Doppler device, and CO was determined with the bolus TD technique performed in triplicate. On comparing the right-sided CO, SV, and CI with those of TD, the mean bias was 0.03 L/min, 1.6 mL, and 0.02 L/min/m 2, respectively. The comparison of left-sided CO, SV, and CI with those of TD revealed a means bias of 0.14 L/min, 1.0mL, and 0.08 L/min/m 2, respectively. Conclusion: This study showed excellent agreement between the values for CO, SV, and CI as determined with USCOM and TD. Since there was only 1 time period for CO estimation in each patient with both methods, the stability of this correlation needs to be further investigated over time.