Measurement of volumetric mitral and aortic blood flow based on a new freehand three-dimensional colour flow imaging method. An in vivo validation

European Journal of Echocardiography : the Journal of the Working Group on Echocardiography of the European Society of Cardiology
B O HaugenH Torp

Abstract

To validate a new three-dimensional (3D) colour flow method used to calculate cardiac output (CO) in aortic and mitral blood flow. The transducer was freely tilted transthoracically using a magnetic locating device recording its spatial position. Raw digital ultrasound data were recorded in healthy subjects during 10-20 heartbeats at a high frame rate ranging from 41 to 66 frames/s and analysed off-line with no loss in temporal resolution. Blood flow velocities aligned with the ultrasound beam were integrated across a moving spherical surface to calculate volumetric flow. The range of agreement between the 3D mitral and 3D aortic method was 0.04+/-1.32 l/min (mean+/-2 standard deviations). The range of agreement between 3D aortic flow and the two-dimensional (2D) pulsed wave Doppler method (2DPW) in the left ventricular outflow tract (LVOT) was 0.7+/-1.7 l/min, while the range of agreement between 3D mitral flow and the 2DPW method was 0.88+/-1.64 l/min. The 3D methods agreed well. The 3D volumetric flow overestimated the 2DPW method, as expected, and the range of agreement was wide. The common pitfalls in pulsed wave ultrasound methods to calculate CO were avoided, as the 3D method was angle-independent, no assumptions about t...Continue Reading

Citations

Jan 29, 2010·European Journal of Echocardiography : the Journal of the Working Group on Echocardiography of the European Society of Cardiology·Felix MatthewsRolf Jenni
Jan 23, 2014·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Sumito KimuraDavid J Sahn
Jan 8, 2005·Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography·Shuping GeMilan Sonka
Mar 31, 2010·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·R W PragerG M Treece

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