The Diastolic and Systolic Velocity-Time Integral Ratio of the Aortic Isthmus Is a Sensitive Indicator of Aortic Coarctation in Fetuses

2019 ◽  
Vol 32 (11) ◽  
pp. 1470-1476 ◽  
Author(s):  
Hongying Wang ◽  
Wenjia Lei ◽  
Jinrong Liu ◽  
Boyang Yang ◽  
Huixian Li ◽  
...  
Keyword(s):  
Aortic Coarctation ◽  
Sensitive Indicator ◽  
Velocity Time Integral ◽  
Aortic Isthmus ◽  
Time Integral ◽  
Integral Ratio

scholarly journals Echocardiographic evaluation of velocity ratio, velocity time integral ratio, and pulmonary valve area in dogs with pulmonary valve stenosis

2018 ◽  
Vol 32 (5) ◽  
pp. 1570-1578 ◽  
Author(s):  
Satoko Nishimura ◽  
Lance C. Visser ◽  
Catherine Bélanger ◽  
Maureen S. Oldach ◽  
Catherine T. Gunther-Harrington ◽  
...  
Keyword(s):  
Pulmonary Valve ◽  
Velocity Ratio ◽  
Pulmonary Valve Stenosis ◽  
Velocity Time Integral ◽  
Time Integral ◽  
Echocardiographic Evaluation ◽  
Integral Ratio ◽  
Valve Area

Mitral to aortic velocity-time integral ratio

1994 ◽  
Vol 15 (10) ◽  
pp. 1335-1339 ◽  
Author(s):  
C. TRIBOUILLOY ◽  
W. F. SHEN ◽  
J. L. REY ◽  
M. C. ADAM ◽  
J. P. LESBRE
Keyword(s):  
Velocity Time Integral ◽  
Time Integral ◽  
Integral Ratio

Aortic run-off in children with arterial shunts or persistent arterial duct—characteristics of flow detected by Doppler techniques in the descending aorta

1995 ◽  
Vol 5 (1) ◽  
pp. 51-55 ◽  
Author(s):  
Cameron J. B. Ward ◽  
Gary F. Sholler
Keyword(s):  
Retrograde Flow ◽  
Velocity Time Integral ◽  
Descending Aorta ◽  
Shunt Flow ◽  
Time Integral ◽  
Arterial Duct ◽  
Diastolic Velocity ◽  
Run Off ◽  
Persistent Arterial Duct ◽  
Integral Ratio

AbstractFlow in the descending aorta was studied to characterize aortic run-off in patients with shunts at the arterial level. Pulsed Doppler examination of descending aortic flow was performed with simultaneous estimation of ratios of shunt-to-systemic flow (shunt flow ratio) at cardiac catheterization. We studied 14 patients with shunt-dependent circulations, eight patients with isolated persistence of the arterial duct, 11 normals and five patients immediately after umbrella occlusion of their persistent arterial duct. Parameters of diastolic flow were standardized to systolic parameters. The ratio of diastolic velocity to the time integral (velocity/time integral retrograde diastolic flow ÷ velocity/time integral systolic flow) ranged from 1×10−1−10.8×10−1. Shunt flow ratios ranged from 0.1−3.9. Pandiastolic retrograde flow was seen in 21 of 22 patients with shunts at the arterial level (the ratio was 0.1 in the remaining patient). No normal patient exhibited pandiastolic retrograde flow. Of the five patients undergoing ductal closure, three exhibited persistent pandiastolic retrograde aortic flow following effective occlusion. The ratio of diastolic velocity to the time integral correlated with the ratio of shunt flow (r=0.76, standard error 0.7). A diastolic velocity/time integral ratio of greater than 8.5×10−1 (sensitivity 67%, specificity 94%) selected patients with shunt flow ratio greater than two, and a diastolic velocity/time integral ratio of less than 5×10−1 (sensitivity 100%, specificity 94%) selected shunt flow ratios of less than 0.5.

Doppler evaluation of the posterior cerebral artery in fetuses with transposition of great arteries

2020 ◽  
Vol 48 (5) ◽  
pp. 504-508
Author(s):  
Ya Tan ◽  
Shi Zeng ◽  
YuShan Liu ◽  
HuaYu Tang ◽  
BaiHua Zhao
Keyword(s):  
Cerebral Artery ◽  
Pulsatility Index ◽  
Posterior Cerebral Artery ◽  
Cerebral Arteries ◽  
Peak Systolic Velocity ◽  
Transposition Of Great Arteries ◽  
Velocity Time Integral ◽  
Time Integral ◽  
Diastolic Velocity ◽  
Doppler Evaluation

AbstractObjectiveTo observe Doppler ultrasound changes in the two segments of the posterior cerebral artery (PCA) in fetuses with transposition of the great arteries (TGA).MethodsThe peak systolic velocity (PSV), end-diastolic velocity (EDV), pulsatility index (PI), and velocity-time integral (VTI) of the two segments of PCA (the first segment: PCAS1, the second segment: PCAS2) and of the middle cerebral artery (MCA) were compared in TGA fetuses and normal fetuses. The abnormality rate between the PCAS1-PI and MCA-PI was compared in TGA fetuses.ResultsThe PCAS1-PI and MCA-PI were smaller in the TGA fetuses than in the controls (all P < 0.05), but the PCAS2-PI was unchanged (P > 0.05). The MCA-VTI, PCAS1-VTI, and PCAS2-VTI were larger in the TGA fetuses (all P < 0.05). In the TGA fetuses, the abnormality rate of the PCAS1-PI was significantly higher than that of the MCA-PI (P < 0.05).ConclusionIn fetuses with TGA, there were hemodynamic differences between the two segments of the posterior cerebral arteries. Moreover, PCAS1 exhibited signs of vasodilatation more obviously than did the MCA in fetuses with TGA.

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