hypertension and stroke
stroke, sometimes called a “brain attack,” occurs when blood flow to an area in the brain is compromised results in the brain cells, deprived of the oxygen and glucose needed to survive and finally die If not caught early, permanent brain damage can result. People who have high blood pressure are 4 to 6 times more chances of stroke. Over time, hypertension leads to atherosclerosis and hardening of the large arteries. This, in turn, leads to blockage and weakening of the walls of small blood vessels in the brain, causing them to balloon and burst and leads to hemorrhage.
High blood pressure, is characterized by a persistent increase in this pressure, even when a person is at rest. High blood pressure is also the most important risk factor for stroke and the leading cause of disability. If left untreated, this “silent killer,” as high blood pressure is often called, is a primary cause not only of stroke, but also of coronary heart diseases, heart failure, kidney disease, and blindness.
Blood pressure is the amount of force that blood exerts on the walls of blood vessels as it travels through the circulatory system. Blood does not travel in a steady flow but is propelled through the blood vessels with the force of every heartbeat. Each time the heart contracts—known as systole—blood pressure rises as more blood is forced through the arteries. Every systole is followed by a moment of relaxation, called diastole, when blood pressure drops as the heart refills with blood and rests before its next contraction. Because pressure in the arteries rises and falls with each heartbeat, Therefore, if the blood pressure is 140/90 mm Hg, this means having systolic pressure of 140 mm Hg and a diastolic pressure of 90 mm Hg.
People below the age of 65 with pre-hypertension were nearly 68% more likely to have a stroke compared to those with normal blood pressure.pre-hypertension is a risk factor for stroke,” which often lead to hypertension, which can damage and weaken artery walls.The strain hypertension places on all the blood vessels makes them weaken and predisposes them to damage. Once blood vessels weaken they are more likely to block. This can cause an ischemic stroke and also cause hemorrhagic strokes when a blood vessel in the brain bursts and blood leaks into the brain.
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