Aunt Wang is 57 years old this year. She is in good health and is a good farmer at home. However, she fainted a few days ago and was admitted to our hospital.
Recalling the onset of the disease, Aunt Wang was squatting in the yard and peeling corn kernels. At this time, the neighbor came to visit her. She stood up and wanted to open the door, but suddenly she felt dark in front of her eyes, dizzy in her head, and then she fell down. Aunt Wang said that there were abnormalities a few days before fainting. She was fine when she was squatting while working, but when she stood up, she felt that her eyes were black, but she could recover in a few minutes. Unexpectedly, she fainted this time.
Clinically, this situation like Aunt Wang is not uncommon. After squatting for a long time, I feel my eyes turn black. What's going on? Today, let’s talk about it in detail.
The problem is mostly here
In fact, the blackness in front of the eyes is the manifestation of cerebral ischemia. From squatting to standing up, this is a change in position, which will affect the distribution of blood in the human body.
When the human body squats or sits for a long time, the blood vessels in the lower limbs are compressed and the blood circulation is blocked. At this time, suddenly stand up, and the blood vessels in the lower limbs are compressed suddenly. Due to gravity, blood in the whole body flows quickly to the waist and legs. In this way, the amount of blood flowing back to the heart will decrease, blood pressure will drop, and the upper body, especially the brain, ischemia is prone to occur.
For normal people, the blood pressure regulation mechanism will be activated immediately in the body, accelerate the heartbeat, strengthen the heart contraction, increase blood pressure, and transport more blood to the whole body to avoid insufficient blood supply. If there is a problem with the regulation process due to some reasons, the blood pressure will suddenly drop from squatting to standing, causing transient cerebral blood supply, resulting in short-term symptoms such as blackness (black), dizziness, and even fainting.
This condition of blood pressure drop when the position changes and you stand quickly is called " orthostatic hypotension ".
These people are more likely to feel dizzy after squatting for a long time
Clinically, orthostatic hypotension is often screened for lying tests. Simply put, it is to measure the blood pressure changes in the lying position and upright position. If the systolic blood pressure drops ≥20mmHg or the diastolic blood pressure drops ≥10mmHg within 3 minutes of standing upright, you will be suspected of orthostatic hypotension.
Generally speaking, people with weak constitution, thin body, do not exercise for a long time or older are prone to orthostatic hypotension. In addition, certain diseases, such as cardiogenic shock caused by acute myocardial infarction, stress cardiomyopathy, etc., brain tumors, cerebral infarction, carotid artery stenosis, , etc., may also experience orthostatic hypotension.
Do you need medicine to take "positional hypotension"?
However, even if it belongs to the above-mentioned susceptible groups, there is no need to worry too much. Pay more attention in daily life to avoid serious symptoms. In life, you should pay attention to these four details:
Slow down the motion. Slowly when changing positions. Don’t stand up suddenly and give your body some reaction time.
Maintain exercise. Exercise more often in normal times can strengthen the ability to regulate blood pressure in the body and reduce the risk of orthostatic hypotension.
Regular work and rest You should ensure adequate sleep every day to avoid blood pressure fluctuations when staying up late.
Regular monitoring. Timely medical treatment is recommended for middle-aged and elderly people to monitor their blood pressure in different positions regularly at home. If you experience symptoms such as brief dizziness and blackness after changing positions, you can go to the cardiology department for further examination and diagnosis to rule out other diseases. For patients with severe symptoms and frequent attacks, medication is needed under the guidance of a doctor.
knocks on the blackboard
squats for a long time and becomes black in front of you. It is likely that the symptoms of cerebral ischemia caused by orthostatic hypotension.
can measure blood pressure at home and stand to screen for orthostatic hypotension.
Change the position and slow down, do more exercise in daily life, develop normal routines, monitor blood pressure regularly, seek medical treatment in time when symptoms are found, and can avoid serious incidents such as fainting and falls caused by orthostatic hypotension. (Liu Jian Peking University People's Hospital )
Source: Beijing Youth Daily
