Auntie Wang is 57 years old, usually in good health, is a good hand in the family farming, but a few days ago, but because of fainting in our hospital.
Looking back on the onset of the process, Auntie Wang was squatting in the yard peeling corn kernels, when the neighbors came over to the door, she stood up to open the door, but suddenly felt a black, dizzy head, and then collapsed. Auntie Wang said that there were abnormalities in the past few days before she fainted. When she was squatting and working, she was fine, but when she stood up, she felt black in front of her eyes, but she recovered after a few minutes, but she never thought she would faint this time.
It is not uncommon for people like Auntie Wang to feel black in front of their eyes when they stand up after squatting for a long time, so what is going on? Today, we’ll talk about it in detail.
Blackness in front of the eyes Most of the problems are here
In fact, black in front of the eyes, this is the performance of cerebral ischemia. From squatting to standing up, this is a change of position, this change of position will affect the distribution of blood in the body.
When the body is squatting or sitting for a long time, the lower limb blood vessels are under pressure, blood circulation is blocked, then suddenly stand up, the lower limb blood vessels under pressure at once lifted, due to gravity, the whole body blood quickly flow to the waist, legs. In this way, the amount of blood flowing back to the heart will be reduced, blood pressure will drop, and the upper body, especially the brain, will be prone to ischemia.
For normal people, this is the time when the body will immediately start the blood pressure regulation mechanism, speed up the heartbeat, strengthen the heart contraction, raise the blood pressure, deliver more blood to the whole body, and avoid the lack of blood supply. If for some reason the regulation process is faulty, the blood pressure will suddenly drop when going from squatting to standing, causing a transient lack of blood supply to the brain, resulting in a brief period of blackness before the eyes (black mask), dizziness, or even fainting and other symptoms.
This kind of when the position change, rapid standing when the blood pressure drop, the medical called “postural hypotension”.
These people squatting for a long time more prone to dizziness
Clinically, postural hypotension is often screened for by the prone position test. Simply put, it is to measure the change in blood pressure between the prone and upright positions, and if the systolic blood pressure drops ≥20mmHg or diastolic blood pressure drops ≥10mmHg within 3 minutes of being upright, postural hypotension is suspected.
Generally speaking, people who are weaker, thinner, do not exercise for a long time or are older are prone to postural hypotension. In addition, certain diseases, such as cardiogenic shock due to acute myocardial infarction and stress cardiomyopathy, brain tumors, cerebral infarction, and carotid stenosis, may also cause postural hypotension.
Does “postural hypotension” require medication?
However, there is no need to worry too much even if you belong to the above-mentioned vulnerable groups. You can avoid serious symptoms by paying more attention to it in normal times. In life, pay attention to these four details.
Slow down your movements, change positions more slowly, do not stand up sharply, and give your body time to react.
Keep exercising More regular exercise can strengthen the body’s blood pressure regulation ability and reduce the risk of postural hypotension.
Regular work and rest You should get enough sleep every day and avoid staying up late to cause blood pressure fluctuations.
Regular monitoring and timely medical consultation It is recommended that middle-aged and elderly people regularly monitor their blood pressure at home in different positions. If symptoms such as transient dizziness and blackness occur after changing position, further examination can be done at the cardiology department to confirm the diagnosis and exclude other diseases. For patients with severe symptoms and frequent episodes, medication is needed under the guidance of a doctor.
knock on the blackboard
Blackness in front of the eyes when standing up after squatting for a long time is likely to be a symptom of cerebral ischemia caused by postural hypotension.
You can screen for postural hypotension at home by measuring blood pressure in the recumbent and standing positions.
Changing position and slowing down, doing more exercise daily, developing normal rest and rest habits, monitoring blood pressure regularly and seeking medical attention when symptoms are detected can prevent serious events such as fainting and falling due to postural hypotension.
