Changes in maternal cerebral blood flow during normal pregnancy as measured by a new angle independent Doppler

2003 ◽  
Vol 189 (6) ◽  
pp. S195
Author(s):  
Ori Nevo ◽  
Israel Thaler ◽  
Jean F Soustiel
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Normal Pregnancy

scholarly journals Cerebral Blood Flow Regulation in Pregnancy, Hypertension, and Hypertensive Disorders of Pregnancy

2019 ◽  
Vol 9 (9) ◽  
pp. 224 ◽  
Author(s):  
Jones-Muhammad ◽  
Warrington
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Normal Pregnancy ◽  
Systemic Blood Pressure ◽  
Normal Brain ◽  
Hypertensive Disorders Of Pregnancy ◽  
Pregnancy Hypertension ◽  
Hypertensive Disorders ◽  
The Brain ◽  
In Pregnancy

The regulation of cerebral blood flow (CBF) allows for the metabolic demands of the brain to be met and for normal brain function including cognition (learning and memory). Regulation of CBF ensures relatively constant blood flow to the brain despite changes in systemic blood pressure, protecting the fragile micro-vessels from damage. CBF regulation is altered in pregnancy and is further altered by hypertension and hypertensive disorders of pregnancy including preeclampsia. The mechanisms contributing to changes in CBF in normal pregnancy, hypertension, and preeclampsia have not been fully elucidated. This review summarizes what is known about changes in CBF regulation during pregnancy, hypertension, and preeclampsia.

Cerebral blood flow regulation, exercise and pregnancy: why should we care?

2016 ◽  
Vol 130 (9) ◽  
pp. 651-665 ◽  
Author(s):  
Michèle Bisson ◽  
Isabelle Marc ◽  
Patrice Brassard
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Pregnant Women ◽  
Normal Pregnancy ◽  
Flow Regulation ◽  
Combined Effect ◽  
Cerebral Vessels ◽  
Blood Flow Regulation

During normal pregnancy cerebral blood flow regulation does not seem to be impaired, however the combined effect of exercise and pregnancy on cerebral vessels remain unknown, highlighting the need to include pregnant women in exercise and cerebrovascular physiology studies.

Alterations in regional decreased cerebral blood flow in patients with irritable bowel syndrome-A PET imaging study

2001 ◽  
Vol 120 (5) ◽  
pp. A637-A637
Author(s):  
Y RINGEL ◽  
D DROSSMAN ◽  
T TURKINGTON ◽  
B BRADSHAW ◽  
R COLEMAN ◽  
...  
Keyword(s):  
Blood Flow ◽  
Irritable Bowel Syndrome ◽  
Cerebral Blood Flow ◽  
Pet Imaging ◽  
Imaging Study ◽  
Irritable Bowel

Patterns of Cerebral Blood Flow and Systemic Hemodynamics During Arithmetic Processing

2008 ◽  
Vol 22 (2) ◽  
pp. 81-90 ◽  
Author(s):  
Natalie Werner ◽  
Neval Kapan ◽  
Gustavo A. Reyes del Paso
Keyword(s):  
Blood Pressure ◽  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Time Course ◽  
Doppler Sonography ◽  
Transcranial Doppler Sonography ◽  
Systemic Hemodynamics ◽  
Heart Period ◽  
Blood Flow Velocities ◽  
Flow Velocities

The present study explored modulations in cerebral blood flow and systemic hemodynamics during the execution of a mental calculation task in 41 healthy subjects. Time course and lateralization of blood flow velocities in the medial cerebral arteries of both hemispheres were assessed using functional transcranial Doppler sonography. Indices of systemic hemodynamics were obtained using continuous blood pressure recordings. Doppler sonography revealed a biphasic left dominant rise in cerebral blood flow velocities during task execution. Systemic blood pressure increased, whereas heart period, heart period variability, and baroreflex sensitivity declined. Blood pressure and heart period proved predictive of the magnitude of the cerebral blood flow response, particularly of its initial component. Various physiological mechanisms may be assumed to be involved in cardiovascular adjustment to cognitive demands. While specific contributions of the sympathetic and parasympathetic systems may account for the observed pattern of systemic hemodynamics, flow metabolism coupling, fast neurogenic vasodilation, and cerebral autoregulation may be involved in mediating cerebral blood flow modulations. Furthermore, during conditions of high cardiovascular reactivity, systemic hemodynamic changes exert a marked influence on cerebral blood perfusion.

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