EFFECTS OF BLOOD PRESSURE ON CEREBRAL CIRCULATION

Effect of reducing elevated blood pressure on cerebral circulation.

Circulation to the brain is protected not only by autoregulation, which maintains cerebral blood flow (CBF) in spite of a decrease in mean arterial pressure, but also by baroreflexes that tend to prevent or minimize hypotension. Hypertensive patients have impaired cerebral autoregulation and depressed baroreflex sensitivity, suggesting that the brain might be vulnerable to a reduction in blood ...

Effects of blood gases on the pressure-flow relationships in canine cerebral circulation.

Effects of Blood Gases on the PressureFlow Relationships in Canine Cerebral Circulation • The effects of the arterial oxygen saturation and carbon dioxide pressure on the pressure-flow relationships in cerebral circulation were studied in 22 dogs. The cerebral blood flow was observed with stepwise lowering of the systemic arterial blood pressure by controlled bleeding in normoxic normocapnic, n...

Effects of hemorrhagic hypotension on the cerebral circulation. I. Cerebral blood flow and pial arteriolar caliber.

Effects of fasting on Blood pressure in normotensive males

Muslims all over the world fast in the holy month of Ramadan. Fasting means abstinence from drinking any liquids, eating, smoking and taking anything parenterally.  It is intermittent in nature from the start of dawn to end at dusk. Fasting has various physiological effects on different biological parameters of the human body. Previous studies that look at effect of Ramadan fasting on blood pre...

Unraveling the human cerebral circulation: insights from cerebral blood pressure and flow recordings.

A.C. BURTON ONCE COMMENTED that the relation of pressure to flow is the “central problem in hemodynamics” (2). This proposition remains true today, as it did more than 50 years ago when revolutionary concepts such as “vascular impedance” and “autoregulation” of regional organ perfusion were only emerging. What has changed over this period is that these concepts have gained acceptance, and their...