Reference values for pulsatility index of fetal anterior and posterior cerebral arteries in prolonged pregnancy

2021 ◽  
Author(s):  
Paolo Rosati ◽  
Silvia Buongiorno ◽  
Silvia Salvi ◽  
Antonio Lanzone ◽  
Alessandra Familiari
Keyword(s):  
Reference Values ◽  
Pulsatility Index ◽  
Cerebral Arteries ◽  
Prolonged Pregnancy

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.

Transcranial Doppler Sonography in Familial Hemiplegic Migraine

Cephalalgia ◽  
1991 ◽  
Vol 11 (1) ◽  
pp. 29-31 ◽  
Author(s):  
Francesco Pierelli ◽  
Flavia Pauri ◽  
Letizia Maria Cupini ◽  
Giancarlo Fiermonte ◽  
Paolo Andrea Rizzo
Keyword(s):  
Cerebral Artery ◽  
Transcranial Doppler ◽  
Pulsatility Index ◽  
Doppler Sonography ◽  
Cerebral Arteries ◽  
Transcranial Doppler Sonography ◽  
Familial Hemiplegic Migraine ◽  
Hemiplegic Migraine ◽  
Haemodynamic Changes ◽  
The Right

A patient affected by familial hemiplegic migraine underwent Transcranial Doppler Sonography twice: the first during a spontaneous attack with right hemiparesis and aphasia, the second during a headache-free period. During the attack the following haemodynamic changes were seen: (a) bilateral increase in the middle cerebral artery and anterior cerebral artery blood flow velocities (this increase was more pronounced on the left side), (b) decreased systo-diastolic ratio and pulsatility index on the right side, (c) increased systo-diastolic ratio and pulsatility index on the left side. Our results indicate that during the attack in this familial hemiplegic migraine patient a diffuse vasoconstriction of the basal cerebral arteries developed. Moreover, Transcranial Doppler Sonography data suggest that a prolonged vasoconstriction of the peripheral arterioles could play a role in determining the neurological symptoms in this syndrome.

Doppler reference values of the fetal vertebral and middle cerebral arteries, at 19–41 weeks gestation

2014 ◽  
Vol 28 (3) ◽  
pp. 338-343 ◽  
Author(s):  
José Morales-Roselló ◽  
Asma Khalil ◽  
Maddalena Morlando ◽  
David Hervás-Marín ◽  
Alfredo Perales-Marín
Keyword(s):  
Reference Values ◽  
Cerebral Arteries ◽  
Middle Cerebral Arteries

scholarly journals Aging alters the dampening of pulsatile blood flow in cerebral arteries

2016 ◽  
Vol 36 (9) ◽  
pp. 1519-1527 ◽  
Author(s):  
Laleh Zarrinkoob ◽  
Khalid Ambarki ◽  
Anders Wåhlin ◽  
Richard Birgander ◽  
Bo Carlberg ◽  
...  
Keyword(s):  
Blood Flow ◽  
Pulse Wave Velocity ◽  
Wave Velocity ◽  
Pulsatile Flow ◽  
Pulsatility Index ◽  
Aortic Stiffness ◽  
Pulse Wave ◽  
Cerebral Arteries ◽  
Age Groups ◽  
Healthy Elderly

Excessive pulsatile flow caused by aortic stiffness is thought to be a contributing factor for several cerebrovascular diseases. The main purpose of this study was to describe the dampening of the pulsatile flow from the proximal to the distal cerebral arteries, the effect of aging and sex, and its correlation to aortic stiffness. Forty-five healthy elderly (mean age 71 years) and 49 healthy young (mean age 25 years) were included. Phase-contrast magnetic resonance imaging was used for measuring blood flow pulsatility index and dampening factor (proximal artery pulsatility index/distal artery pulsatility index) in 21 cerebral and extra-cerebral arteries. Aortic stiffness was measured as aortic pulse wave velocity. Cerebral arterial pulsatility index increased due to aging and this was more pronounced in distal segments of cerebral arteries. There was no difference in pulsatility index between women and men. Dampening of pulsatility index was observed in all cerebral arteries in both age groups but was significantly higher in young subjects than in elderly. Pulse wave velocity was not correlated with cerebral arterial pulsatility index. The increased pulsatile flow in elderly together with reduced dampening supports the pulse wave encephalopathy theory, since it implies that a higher pulsatile flow is reaching distal arterial segments in older subjects.

Sign in / Sign up

Export Citation Format

Share Document