However, due to the interaction of multiple vasocontrictive and vasodilative effectors, there is a significant nonlinear response to the influence of neural factors, particularly at higher levels of nerve activity (often seen in subjects with high blood pressure) which leads to low blood flow ...
constriction or narrowing of a blood vessel or vessels, as in response to a nerve impulse. vasoconstriction词源中文解释 1899年,由 vas 和 constriction 的组合形成。 vasoconstriction_体育行业词汇 血管收缩 vasoconstriction_医学行业词汇 血管收缩:尤指小动脉收缩导致进入某一器官的血流减少 ...
and the diffuse activation of endothelium leads to systemic vasoconstriction.10Of note, PRES has been shown to develop in patients with only mild elevation in blood pressure or in those who are normotensive,4,10adding credence to the idea that hypertension is not the inciting cause. In the vast...
body temperature, breathing, and blood pressure rise to daytime levels. Your sympathetic nervous system, which helps with automatic responses like "fight or flight," gets very active. And yet your body stays almost completely still.
Sympathetic vasoconstriction plays an important role in the control of blood pressure and the distribution of blood flow. In this issue of Science Signaling, Billaud et al. show that sympathetic vasoconstriction occurs through a complex scheme involving the activation of large-pore pannexin 1 channels...
Of the eight patients, seven were middle゛ged, six had apparent triggers, six had subarachnoid hemorrhage (SAH), five had high systolic blood pressure, and none had any specific abnormality observed upon physical examination. At the initial visit, RCVS was diagnosed in only one patient who ...
A Bipolar Analysis of Blood Pressure Phenomena: The Vasoconstriction and Volume Factors in Normotension and in the Spectrum of Hypertensive Disorders as Revealed by Renin-Sodium Profiling or Pharmacologic Probes; Prorenin as a Determinant of Renin Secretion John H. Laragh, Jean E. Sealey $29.95 ...
can be explained within a single model: the model predicts that HPV increases mean pulmonary artery pressure in APE (by 8.2±7.0% in these subjects), and concurrently shows a reduction in response to hypoxia in the subjects who have high levels of occlusion and therefore maximal HPV in ...
It is also known that it is the Po2 of the alveolar gas, not of the pulmonary arterial blood, that chiefly determines the response.46 This can be proved by perfusing a lung with blood with a high Po2 while keeping the alveolar Po2 low; under these conditions the vasoconstrictive ...
Figure 2. Microvascular blood flow during baseline and thermal stimulation cycles in all subjects. There was a significant decrease in MBF from baseline with thermal stimulation. Mean ± SEM. Repeated-measures ANOVA from baseline MBF. *P = .027; **P < .0001. Download: Download high-res image...