When ventricular tachycardia occurs it may lead to a decrease in blood flow to the body.
The research shows that when G-force gets high enough or lasts long enough, it causes a decrease in blood flow to the brain.
They may represent a transient ischemic attack, or TIA — a temporary decrease in blood flow to the brain, sometimes called a ministroke.
A TIA, or mini stroke, is a problem in the blood vessels of the brain that causes a temporary decrease in blood flow to a certain brain region.
And in fact, if you just do a back of envelope calculation, and sum this up, this predicts about a 20% decrease in blood flow overall.
A decrease in blood flow may be caused by loss of sodium and water (as a result of diarrhea, persistent vomiting, or excessive perspiration) or by narrowing of a renal artery.
Thromboxanes, on the other hand, are powerful vasoconstrictors that cause a decrease in blood flow and an increase in blood pressure.
A weakening immune system as people age may also play a role, as may a decrease in blood flow and changes in the wound-healing "cascade" that is set off by injury.
This transient initial decrease in blood flow was not, however, observed in the skeletal muscle at either temperature.
In two relatively large studies with 31 [20] and 51 [21] patients, respectively, no decrease in blood flow velocity was found with TCD during migraine attacks.
Analysis of regional flow revealed that only a thin rim of right ventricular tissue near the ventriculotomy showed a significant decrease in blood flow (1.10 +/- 0.1 ml/min/gm to 0.29 +/- 0.04 ml/min/gm; p less than 0.05).
