Blood flows in people's blood vessels, just like river water. The faster the flow rate, the less precipitation. Conversely, the slower the flow rate, the more precipitation. When the blood pressure is low, the blood flow rate of human body is slow, and the blood viscosity and coagulability are high, which affects the blood supply to the brain and heart and makes the brain and heart in different degrees of hypoxia. These effects will not produce obvious symptoms in the short term, but in the long run, people's physical functions will be seriously affected, such as fatigue, mental fatigue, depression and depression, or gradually lead to the decline of visual and auditory functions, and greatly increase the incidence of dizziness, fainting, falls and fractures. With the increase of age, the elderly are prone to arteriosclerosis, which narrows the lumen of blood vessels, weakens the elasticity of blood vessel walls, and is more likely to form thrombosis with low blood pressure and slow blood flow, leading to ischemic stroke. Similarly, due to slow blood flow, the brain is deprived of oxygen for a long time, which may even cause brain atrophy and induce or aggravate Alzheimer's disease. Therefore, the elderly with low blood pressure should not be taken lightly, especially when dizziness, unstable standing or even syncope occur, and arteriosclerosis and high blood viscosity may cause insufficient blood supply to brain tissue or even cerebral thrombosis.
Experts also reminded that people with low basic blood pressure are often easily overlooked when suffering from high blood pressure, which is even more dangerous if they are not controlled and treated in time. Some people's basal blood pressure may be as low as 85/55mmHg without obvious discomfort. For this kind of people, normal hypertension can't be measured by120 ~139/80 ~ 89 mmhg like the general population. Sometimes even the normal blood pressure value of ordinary people 1 15/85mmHg may still cause hypertension symptoms in people with low basic blood pressure. Therefore, the so-called hypertension or hypotension cannot be judged by simple data. For people who have been suffering from hypotension, it is more important to pay attention to the changes of their basic blood pressure, and not to be ignorant and become a recessive hypertensive patient without knowing it.
Prevention and treatment
Physical exercise and diet should be "two-pronged"
The prevention and treatment of hypotension should be aimed at different types. If it is secondary hypotension, we should actively treat the primary disease. For those with asymptomatic low basal blood pressure, medication is generally not needed, but physical exercise and diet therapy are emphasized for prevention and treatment, and the elderly with postural hypotension are specially reminded to be careful everywhere in their daily lives:
Physical exercise: In particular, the elderly should exercise moderately to avoid excessive physical exertion. They can choose some moderate exercises, such as walking, jogging, playing Tai Ji Chuan and practicing Qigong.
Dietotherapy: increase diet nutrition and eat more foods that warm and tonify spleen and kidney. The daily salt intake can be slightly higher than that of ordinary people, which is helpful to raise blood pressure and improve symptoms such as dizziness, lethargy and fatigue; Often eat ginger, Jiang Mo can be sprinkled in vegetable soup or Jiang Mo soaked in water instead of tea to promote digestion, strengthen the stomach and raise blood pressure; Eat less foods such as melon, watermelon, celery, hawthorn, bitter gourd, mung bean, garlic, kelp, onion, sunflower seeds and so on. Eat less and eat more, and don't move immediately after meals. You can rest for 30 to 60 minutes before you stand up and walk. Because blood accumulates in internal organs after meals, the circulating blood volume decreases. At this time, if you suddenly stand up and walk, you can induce postural hypotension.