title: Cardiac output estimation after off-pump coronary artery bypass: a comparison of two different techniques.
abstract: The present study compares the cardiac output (CO) estimated by a new, non-invsive continuous Doppler device (Ultrasonic cardiac output monitor-USCOM) with that by bolus thermodilution technique (TD). Thirty post off-pump coronary artery bypass graft surgery patients were studied in this prospective nonrandomized study. Right heart CO estimation by USCOM and TD was performed and measured in quadruplet. A total of 120 paired observations were made. The mean CO was 4.63 and 4.76 Llmin as estimated by TD and USCOM respectively. For TD and USCOM, the CO had a mean bias (tendency of one technique to differ from other) of -0.13 L/min and limits of agreement (mean bias +/- 2SD) at -0.86 and 0.59 L/min. The study reveals very good agreement between the values of CO estimated by USCOM and TD.
authors.affiliation: Department of Anaesthesiology and Critical Care, Escorts Heart Institute and Research Centre, New Delhi, India.
authors.forename: Dheeraj
authors.initials: D
authors.lastname: Arora
authors.forename: Rajesh
authors.initials: R
authors.lastname: Chand
authors.forename: Yatin
authors.initials: Y
authors.lastname: Mehta
authors.forename: Naresh
authors.initials: N
authors.lastname: Trehan
mesh_terms: D000328:Adult; D000368:Aged; D002302:Cardiac Output; D047549:Coronary Artery Bypass, Off-Pump; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000295:instrumentation / Q000379:methods; D011182:Postoperative Care / Q000295:instrumentation / Q000379:methods; D011446:Prospective Studies; D015203:Reproducibility of Results; D013815:Thermodilution; D018608:Ultrasonography, Doppler