title: Non-invasive measurement of cardiac output in obese children and adolescents: comparison of electrical cardiometry and transthoracic Doppler echocardiography.
abstract: The objective of this study was to evaluate the reliability and accuracy of electrical cardiometry (EC) for the noninvasive determination of cardiac output (CO) in obese children and adolescents. We compared these results with those obtained by transthoracic echocardiography. Sixty-four participants underwent simultaneous measurement of CO. Cardiac output was measured by EC using the ICON(®) device. Simultaneously CO was determined by using transthoracic Doppler echocardiography from parasternal long-axis and apical view. The median age was 12.52 years (range 7.9-17.6 years) and 36 (56 %) were female. A strongly significant correlation was found between the COEC and COEcho measurements (p < 0.0001, r = 0.91). Significant correlations were also found between CO and age (r = 0.37, p = 0.002), weight (r = 0.57, p < 0.0001), height (0.60, p < 0.0001) and BMI (r = 0.42, p = 0.001). The mean difference between the two methods (COEC - COEcho) was 0.015 l min(-1). According to the Bland and Altman method, the upper and lower limits of agreement, defined as mean difference ±2 SD, were +1.21 and -0.91 l min(-1), respectively. Compared to the transthoracic Doppler echocardiography, Electrical Cardiometry provides accurate and reliable CO measurements in obese children and adolescents.
authors.affiliation: Division of Paediatric Cardiology, Department of Paediatrics, University of Western Ontario, 800 Commissioners Rd E, PO Box 5010, London, ON, N6A 5W9, Canada.
authors.forename: Ralf
authors.initials: R
authors.lastname: Rauch
authors.forename: Eva
authors.initials: E
authors.lastname: Welisch
authors.forename: Nathan
authors.initials: N
authors.lastname: Lansdell
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Burrill
authors.forename: Judy
authors.initials: J
authors.lastname: Jones
authors.forename: Tracy
authors.initials: T
authors.lastname: Robinson
authors.forename: Dirk
authors.initials: D
authors.lastname: Bock
authors.forename: Cheril
authors.initials: C
authors.lastname: Clarson
authors.forename: Guido
authors.initials: G
authors.lastname: Filler
authors.forename: Kambiz
authors.initials: K
authors.lastname: Norozi
mesh_terms: D000293:Adolescent; D000465:Algorithms; D002302:Cardiac Output / Q000502:physiology*; D002648:Child; D003430:Cross-Sectional Studies; D004452:Echocardiography / Q000379:methods*; D004594:Electrophysiology / Q000379:methods*; D005260:Female; D006439:Hemodynamics; D006801:Humans; D016014:Linear Models; D008297:Male; D009765:Obesity / Q000175:diagnosis / Q000503:physiopathology*; D011446:Prospective Studies; D015203:Reproducibility of Results; D012815:Signal Processing, Computer-Assisted; D018608:Ultrasonography, Doppler / Q000379:methods*