Korean J Anesthesiol.  2012 May;62(5):423-428. 10.4097/kjae.2012.62.5.423.

Accuracy of cardiac output measurements during off-pump coronary artery bypass grafting: according to the vessel anastomosis sites

• Park SY
• Kim DH
• Joe HB
• Yoo JY
• Kim JS
• Kang M
• Hong YW

• KMID: 2243820
• DOI: http://doi.org/10.4097/kjae.2012.62.5.423

Abstract

BACKGROUND
During beating heart surgery, the accuracy of cardiac output (CO) measurement techniques may be influenced by several factors. This study was conducted to analyze the clinical agreement among stat CO mode (SCO), continuous CO mode (CCO), arterial pressure waveform-based CO estimation (APCO), and transesophageal Doppler ultrasound technique (UCCO) according to the vessel anastomosis sites.
METHODS
This study was prospectively performed in 25 patients who would be undergoing elective OPCAB. Hemodynamic variables were recorded at the following time points: during left anterior descending (LAD) anastomosis at 1 min and 5 min; during obtuse marginal (OM) anastomosis at 1 min and 5 min: and during right coronary artery (RCA) anastomosis at 1 min and 5 min. The variables measured including the SCO, CCO, APCO, and UCCO.
RESULTS
CO measurement techniques showed different correlations according to vessel anastomosis site. However, the percent error observed was higher than the value of 30% postulated by the criteria of Critchley and Critchley during all study periods for all CO measurement techniques.
CONCLUSIONS
In the beating heart procedure, SCO, CCO and APCO showed different correlations according to the vessel anastomosis sites and did not agree with UCCO. CO values from the various measurement techniques should be interpreted with caution during OPCAB.

Keyword

Cardiac output; Cardiovascular; Measurement techniques; OPCAB

MeSH Terms

Arterial Pressure
Cardiac Output
Coronary Artery Bypass, Off-Pump
Coronary Vessels
Glycosaminoglycans
Heart
Hemodynamics
Humans
Prospective Studies
Thoracic Surgery
Glycosaminoglycans