Stroke »
What is a stroke?
A stroke, or cerebrovascular accident (CVA), occurs when blood supply to part of the brain is disrupted, causing brain cells to die. When blood flow to the brain is impaired, oxygen and glucose cannot be delivered
to the brain. Blood flow can be compromised by a variety of mechanisms.
Blockage of an artery
- Narrowing of the small arteries within the brain can cause a so-called lacunar stroke, (lacune=empty space). Blockage of a single arteriole can affect a tiny area of brain causing that tissue to
die (infarct).
- Hardening of the arteries (atherosclerosis) leading to the brain. There are four major blood vessels that supply the brain with blood.
The anterior circulation of the brain that controls most motor, activity, sensation, thought, speech, and emotion is supplied by the carotid arteries.
The posterior circulation, which supplies the brainstem and the cerebellum, con...
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I am a 50-year-old woman and have had four episodes of deep vein thrombosis. The first one occurred after my third childbirth. Each time the site is my right leg, probably damaged during the first clot. There is no known factor identified, and I have been on warfarin therapy since the third episode. The first three episodes were accompanied by the usual swelling, heat, discoloration of the leg before I was diagnosed with DVT. But this last time, the clot was caught very early, before the vein was blocked completely. I have noticed that I know something is wrong with circulation in my leg way before these more obvious symptoms begin. These include a feeling of tiredness in the leg, especially when beginning exercise, but then feeling better as exercise increases the circulation. The veins in my foot and ankle stand out more. There is a mild but constant internal ache in the leg and an odd “plugged” feeling. Sometimes the vein actually feels irritated to me, and perhaps more full to the touch. My affected leg is always slightly larger, and slightly a different color than the other, due to poorer circulation, but the color begins to change subtly darker, and it also feels colder than the other foot when this problem is beginning. My right foot will often feel tingly when I first stand on it in the morning, in spite of exercising foot and ankle before getting up. I sometimes have a hard time convincing my physician that I can feel when things are happening inside the vein, but with experience, I am clearer and clearer that I can. He sent me for an ultrasound of my leg this time, even though he said he did not suspect a clot. The ultrasound showed a "web" or strings of clot just beginning to form. My hospital time and rehab has been much quicker. Published: June 30 ::