Low Blood Pressure – A Danger

Too low blood pressure has many health risks, sometimes even life-threatening. The following article will help readers prevent low blood pressure and its harmful effects.
How much is low blood pressure?
According to experts, called low blood pressure when the maximum blood pressure reading (systolic blood pressure) is at or below 90mmHg and the minimum blood pressure (diastolic blood pressure) is equal to or below 60mmHg.
However, that is just an average, to say that it is low blood pressure, in fact it is low for one person but in others it is normal because they do not have symptoms of Low blood pressure such as dizziness, fainting or loss of consciousness
People distinguish the following types of low blood pressure: low with standing posture, like a person lying or sitting but standing up, especially because standing up too fast or standing all day long will be dull, staggered, fast face.
Normally, when changing this position, there will be about 300-800ml of blood accumulated to the lower body by gravity, then the body will fall into anemia

.
But thanks to the body has cardiovascular, neurological, biochemical reactions to deal with this case such as: the muscles in the lower limbs constrict, the abdominal wall squeezes the blood vessels from the bottom upwards. Therefore, the consequence of low blood pressure is only a few seconds.
If these mechanisms are not effective, the harm of postural hypotension will be prolonged, often seen in elderly, debilitated and healthy people when sitting for a long time with crossed legs and then suddenly stand up

The cause may be due to certain medications, impaired venous function, decreased blood volume, heart failure, neurological disorders.




Low due to conduction disorders between the heart-brain nerves. In people standing for too long, blood pressure is usually low, but the body can adjust to normal blood pressure.
But in some people, especially young people, the mechanism of regulation is disordered: instead of reporting low blood pressure, the nerve at the heart sends out the opposite signal (high blood pressure) causing the brain to order a decrease in heart rate. and lowering blood pressure. The blood goes down to the abdomen and lower extremities much, to the little brain, patients feel agitated, dizzy.
Low after meals: within 2 hours after eating, blood pressure can be reduced to 20mmHg, especially in the elderly, people with hypertension, cardiovascular disease, are taking drugs to treat hypertension.
Patients may faint, chest pain, dizziness, tiredness, nausea, blurred vision, even stroke

It is thought that after eating, blood rushes to the intestines and stomach to help digest food, thus reducing blood flow to the brain and other organs.




Sometimes due to the effect of insulin reduces blood sugar and reduces blood pressure ... The body adjusts by increasing the amount of blood pumped from the heart and peripheral vascular constriction. If this mechanism is impaired, brain anemia will cause these symptoms.
There are many factors leading to low blood pressure, such as: dehydration due to vomiting, vomiting, diarrhea, fever, heavy use of diuretics, severe burns, excessive sweating.
Hemorrhage reduces blood volume and low blood pressure. Pregnant women, blood vessels dilate, reduce the pressure of blood on the arteries, thus lowering blood pressure.




Heart disease: heart failure, arrhythmia, bradycardia ... Endocrine diseases: diabetes, hyperthyroidism, Parkinson's, brain injury, chemical poisoning, liver failure, prolonged lying ...
Septicemia, severe allergies, deficiency of vitamin B12, folic acid ..



. Use of drugs: diuretic, vasodilator, viagra, anti-depressant, analgesic ...
How to know low blood pressure?
A person with low blood pressure often has the following symptoms: dizziness, fainting, drowsiness, poor concentration, nausea, blurred vision, rapid breathing, cold skin, thirst. If blood pressure is too low, the patient may suffer from circulatory collapse, shock ...




Treatment and prevention
In healthy people with low blood pressure who only have occasional symptoms of dizziness when standing up, there is no need for treatment.
In severe cases, it is necessary to treat the cause of low blood pressure. For people with very low blood pressure causing shock, emergency medical treatment is required.
Methods to minimize symptoms of low blood pressure: drink plenty of fluids to prevent dehydration and raise blood pressure. Use extra salt to raise your blood pressure. Limit alcohol consumption as alcohol causes dehydration and vasodilation.
Do not stand for too long. When standing up from lying down or sitting, only stand up slowly.



People with low blood pressure after eating: should not take anti-hypertensive medication before eating, should lie down after eating, eat many small meals. Drinking coffee has the vasoconstrictive effect but should be taken in the morning to avoid insomnia..

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