Quantification of chronic aortic regurgitation by vector flow mapping: a novel echocardiographic method

European Journal of Echocardiography : the Journal of the Working Group on Echocardiography of the European Society of Cardiology
Chen LiLi Rao

Abstract

Quantification of aortic regurgitation (AR) using echocardiography is challenging. A newly established echocardiographic method, vector flow mapping (VFM), can directly measure blood flow volume (FV) regardless of rheological characteristics. We intended to assess the accuracy of VFM in the quantification of chronic AR. Twenty-one patients with chronic AR, along with 21 healthy volunteers selected as controls, underwent conventional echocardiography and estimation of aortic blood flow using quantitative Doppler and VFM. The regurgitation ratio (RegR), derived as the quotient of backward and forward aortic FV in the ascending aorta measured by VFM, increased with AR severity: 1.1 +/- 1.5% (normal), 11.4 +/- 3.8% (mild AR), 31.2 +/- 8.0% (moderate AR), and 59.3 +/- 4.7% (severe AR). In a linear regression model, RegR closely correlated with the VC width (r = 0.932) and regurgitation fraction and effective regurgitant orifice measured by the quantitative Doppler method (r = 0.929 and 0.891, respectively). The intra- and interobserver variability of RegR was 4.2 and 6.7%, respectively. There was no difference between RegR measured in the apical five-chamber view and in that in apical three-chamber view using the paired t-test (P = ...Continue Reading

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Citations

Nov 28, 2013·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Ming ChenSheng-lin Liu
Aug 3, 2013·European Heart Journal Cardiovascular Imaging·Daniel Rodriguez MuñozJosé Luis Zamorano Gómez
Jul 15, 2021·Echocardiography·Martina AvesaniXavier Iriart
Aug 28, 2021·Journal of Clinical Medicine·Jeffrey Shi Kai ChanAlex Pui-Wai Lee

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