Transthoracic Vector Flow Imaging in Pediatric Patients with Valvular Stenosis-A Proof of Concept Study
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Transthoracic Vector Flow Imaging in Pediatric Patients with Valvular Stenosis-A Proof of Concept Study. / Nguyen, Tin Quoc; Bechsgaard, Thor; Schmidt, Michael Rahbek; Juul, Klaus; Moshavegh, Ramin; Lönn, Lars; Nielsen, Michael Bachmann; Jensen, Jorgen Arendt; Hansen, Kristoffer Lindskov.
In: Ultrasound International Open, Vol. 7, No. 2, 2021, p. E48-E54.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Transthoracic Vector Flow Imaging in Pediatric Patients with Valvular Stenosis-A Proof of Concept Study
AU - Nguyen, Tin Quoc
AU - Bechsgaard, Thor
AU - Schmidt, Michael Rahbek
AU - Juul, Klaus
AU - Moshavegh, Ramin
AU - Lönn, Lars
AU - Nielsen, Michael Bachmann
AU - Jensen, Jorgen Arendt
AU - Hansen, Kristoffer Lindskov
N1 - Publisher Copyright: © 2021. The Author(s).
PY - 2021
Y1 - 2021
N2 - Purpose Continuous wave Doppler ultrasound is routinely used to detect cardiac valve stenoses. Vector flow imaging (VFI) is an angle-independent real-time ultrasound method that can quantify flow complexity. We aimed to evaluate if quantification of flow complexity could reliably assess valvular stenosis in pediatric patients. Materials and Methods Nine pediatric patients with echocardiographically confirmed valvular stenosis were included in the study. VFI and Doppler measurements were compared with transvalvular peak-to-peak pressure differences derived from invasive endovascular catheterization. Results Vector concentration correlated with the catheter measurements before intervention after exclusion of one outlier (r=-0.83, p=0.01), whereas the Doppler method did not (r=0.49, p=0.22). The change in vector concentration after intervention correlated strongly with the change in the measured catheter pressure difference (r=-0.86, p=0.003), while Doppler showed a tendency for a moderate correlation (r=0.63, p=0.07). Conclusion Transthoracic flow complexity quantification calculated from VFI data is feasible and may be useful for assessing valvular stenosis severity in pediatric patients.
AB - Purpose Continuous wave Doppler ultrasound is routinely used to detect cardiac valve stenoses. Vector flow imaging (VFI) is an angle-independent real-time ultrasound method that can quantify flow complexity. We aimed to evaluate if quantification of flow complexity could reliably assess valvular stenosis in pediatric patients. Materials and Methods Nine pediatric patients with echocardiographically confirmed valvular stenosis were included in the study. VFI and Doppler measurements were compared with transvalvular peak-to-peak pressure differences derived from invasive endovascular catheterization. Results Vector concentration correlated with the catheter measurements before intervention after exclusion of one outlier (r=-0.83, p=0.01), whereas the Doppler method did not (r=0.49, p=0.22). The change in vector concentration after intervention correlated strongly with the change in the measured catheter pressure difference (r=-0.86, p=0.003), while Doppler showed a tendency for a moderate correlation (r=0.63, p=0.07). Conclusion Transthoracic flow complexity quantification calculated from VFI data is feasible and may be useful for assessing valvular stenosis severity in pediatric patients.
KW - catheters
KW - echocardiography
KW - vector flow imaging, valvular stenosis, pressure gradient
U2 - 10.1055/a-1652-1261
DO - 10.1055/a-1652-1261
M3 - Journal article
C2 - 34804771
AN - SCOPUS:85120321585
VL - 7
SP - E48-E54
JO - Ultrasound International Open
JF - Ultrasound International Open
SN - 2199-7152
IS - 2
ER -
ID: 288190059