Ache or sensation of tightness, pressure, or constriction, widely varied in intensity, frequency, and duration, sometimes long-lasting [13].
The diagnostic criteria for muscle contraction or tension headache were those that were commonly recognized at the time the study was conducted, i.e.: a. Ache or sensation of tightness, pressure, or constriction, widely varied in intensity, frequency, and duration, sometimes long-lasting [13].
Normal arteries respond to elevations in intraluminal pressure with constriction and to pressure reduction with dilation via mechanisms that are inherent to vascular smooth muscle and independent of neural, metabolic, and hormonal influences.
Be sure to carry a light bag or purse and avoid handling heavy bags, (especially avoid carrying them on the shoulder or the crook of your arm) to minimize pressure and constriction on your arm.
Arterioles were equilibrated for 60 min, until pressure-induced constriction (myogenic tone) developed, usually about 50% of the maximum diameter measured in calcium free Krebs (2 mM, EGTA) and the diameter (μm) was measured by video microscopy using either an automated computer program (DiamTrak) or video callipers as previously described [ 33].
Airspeed is determined by measuring the pressure at the constriction in the tube.
The fall in blood pressure beyond the constriction leads to increased secretion of renin from the JGA with the formation of the vasoactive angiotensin II.
With regard to the mechanism of HPVG, it has been suggested that elevated intraluminal pressure caused by constriction of the intestine can allow bowel gas to enter the portal venous circulation through either microscopic mucosal perforations or disease invasions deeper than the submucosal layer [1].
In addition to the myoglobinuria, two other mechanisms contribute to kidney impairment: low blood pressure leads to constriction of the blood vessels and therefore a relative lack of blood flow to the kidney, and finally uric acid may form crystals in the tubules of the kidneys, causing obstruction.
A fabric band was placed around the descending thoracic aorta to control left ventricular peak pressure by aortic constriction.
