A cerebrovascular accident (CVA), or stroke, is an abnormal flow of the blood that affects a region more or less of the brain. It occurs as a result of a blocked or damaged blood vessel and leads to the death of nerve cells that are deprived of oxygen and nutrients essential to their functions. In most people, there is no precursor to an attack. However, several risk factors were monitored. Strokes have very different consequences. More than half of the people affected negatively. About 10% of individuals are entirely cured. The risk depends on the region of the brain damage and the functions it controls. The more oxygen-starved part, the greater the effects are likely to be necessary. Following a stroke, some people have difficulty speaking or writing, and he has a problem in memory. They may also be achieved a more or less substantial paralysis of the body.
In eight out of ten cases, strokes are ischemic strokes: the interruption of blood flow is due to a clot (coagulated blood) that blocks an artery to the brain. The leading cause is atherosclerosis; it is an accumulation of cholesterol deposits on the artery walls. These deposits progressively harden and form atherosclerotic plaques that narrow the arteries and promotes clot formation. In some cases, a plate fragment can also break off and obstruct an artery within the brain. Sometimes, the origin of the stroke is the formation of a blood clot away from the brain, for example, in the heart. The blood then carries this clot to the brain.
They are less common (20% of cases). Stopping the flow of blood is due to the rupture of an artery of the brain.
The leading cause of hemorrhagic stroke is high blood pressure. In some cases, the rupture can occur on a pre-existing condition of the artery aneurysm or arteriovenous malformation.
It represents from 40% to 50% of cases. It occurs when a blood clot forms in a cerebral artery, a lipid plaque (atherosclerosis).
When nerve cells are deprived of oxygen, if only for a few minutes, then die. Also, the time between stroke and medical care is short; the risk of a severe sequel is shrinking. Whatever the damage caused by oxygen deprivation, the brain has some adaptability. Healthy nerve cells sometimes manage to take over the dead cells if they are stimulated by various exercises.
Atherosclerosis, that is to say, the formation of lipid plaques on the walls of blood vessels is one of the major causes of stroke. Hypertension is a significant risk factor. Over time, the abnormal pressure exerted by the blood on the wall of blood vessels can cause them to break. The presence of an aneurysm can facilitate the rupture of an artery in the brain. The aneurysm is a swelling of a small section of an artery due to weakness of the wall. It is not always possible to determine the exact cause of stroke. It is essential, however, that doctors seek it by performing various tests to reduce the risk of recurrence.
In general, there are no or few signs that herald the onset of a stroke. Symptoms appear suddenly and depend on the area of the brain damage:
The risk increases with age after the age of 50 in men and after 60 in women.
The risk increases if, in your family:
Learn to identify cardiovascular risk factors not to underestimate them.
One speaks of diabetes when blood sugar (blood sugar or glucose) is greater than 1.26 g / l fasting in two steps. If you have poorly controlled diabetes, excess glucose in your blood can damage the walls of your arteries.
We talk about high blood pressure (hypertension) if:
Tobacco promotes the narrowing of the arteries, blood clots, and the development of cardiac rhythm disorders. Smoking increases by 2 the risk of stroke.
We distinguish the bad cholesterol (LDL) cholesterol levels of good cholesterol (HDL cholesterol). If you overeat fat, if you suffer from obesity or if you do not practice physical activity, and increases bad cholesterol accumulates on the walls of your arteries as fatty deposits. Over time, these deposits can slow and block the flow of blood is atherosclerosis.
We speak of overweight when the body mass index (BMI) greater than 25 and obese if it is greater than 30.
The presence of abdominal fat is a risk factor. There is talk of abdominal obesity when waist circumference exceeds 88 cm for women and 102 cm for men.
That is to say if you made less than 30 minutes of physical exercise a day.
Alcohol, whatever its level increases the risk of hemorrhagic stroke. Consumption of more than 30 drinks per month and/or the practice of binge drinking increases the risk of ischemic stroke.
Researchers reviewed 375 studies published between 1979 and 2004 to identify the type of power that best helps prevent stroke. According to their analysis, a low-salt diet (less than 1150 mg per day) and rich in potassium and magnesium lowers blood pressure and, thus, helps to prevent stroke. A diet containing vegetables-fruits, which are a source of antioxidant elements, gives adequate amounts of potassium. Whole grains, nuts, seeds, legumes, and dark green leafy vegetables are good sources of potassium. Studies show that people who eat about ten servings of fruits and vegetables a day, that emphasize whole grains and eat from January to February servings of fatty fish per week are less likely to suffer a stroke.
In terms of the plans, it was shown that the Mediterranean diet helps effectively prevent hypertension.
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