Do people transient ischemic attack have high blood pressure? do they have hbd while have the symptoms?

Yes they do: Blood clots atherosclerosis blood clots can float downstream from the heart and get caught in a tiny blood vessel (embolus) debris can occlude the blood vessels and stop blood flow. Blood vessels can leak and cause bleeding within the brain tissue. An intracerebral hemorrhage is often caused by high blood pressure which can cause small blood vessel walls to become thin and weak.

Frequently yes: Tia's often reflect reduced perfusion to the smaller blood vessels in the brain. This happens from persistent vessel wall thickening (an adaptation in chronic htn). In addition to bleeding possibilities (which more typically cause persistent symptoms, not transient), minor fluctuations in cerebral perfusion can cause transient symptoms in patients with thickened, pruned distal cerebral vessels.

Yes: High blood pressure is a common risk factor for tia. Patients having TIA often present with high blood pressure as well. Since TIA is often caused by lack of blood flow to the brain, the body tries to elevate the blood pressure to ensure proper perfusion of the brain.