What causes low blood pressure?

Written by Zeng Wei Jie
Cardiology
Updated on September 17, 2024
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There are many causes of low blood pressure. A significant portion of chronic hypotension is due to physical constitution, with some patients who are generally frail having consistently low blood pressure but no symptoms. This type is quite common. Secondly, postural hypotension is also fairly common, often seen in elderly people or those taking antihypertensive medications, such as receptor blockers. These patients may experience transient dizziness and transient low blood pressure when getting up, known as postural hypotension. Moreover, the more common type is acute, sustained low blood pressure, which includes various causes of shock, myocardial infarction, cardiac tamponade, or acute blood loss, which can be life-threatening conditions requiring urgent treatment.

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Written by Zhang Yue Mei
Cardiology
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How to treat low blood pressure?

The treatment of hypotension varies based on the cause and the underlying diseases. Mild hypotension without any accompanying diseases can often be managed by nutritional adjustments, proper rest, avoiding overwork, and refraining from staying up late and smoking. These measures can help gradually increase blood pressure. In cases where hypotension is caused by shock, bleeding, or heart disease, treatment should address these conditions while also replenishing blood volume and administering antihypertensive drugs as necessary. Severe hypotension can be life-threatening, thus, acute and severe low blood pressure is considered a critical condition that requires immediate emergency treatment.

doctor image
home-news-image
Written by Zeng Wei Jie
Cardiology
52sec home-news-image

What causes low blood pressure?

There are many causes of low blood pressure. A significant portion of chronic hypotension is due to physical constitution, with some patients who are generally frail having consistently low blood pressure but no symptoms. This type is quite common. Secondly, postural hypotension is also fairly common, often seen in elderly people or those taking antihypertensive medications, such as receptor blockers. These patients may experience transient dizziness and transient low blood pressure when getting up, known as postural hypotension. Moreover, the more common type is acute, sustained low blood pressure, which includes various causes of shock, myocardial infarction, cardiac tamponade, or acute blood loss, which can be life-threatening conditions requiring urgent treatment.

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home-news-image
Written by Zhang Yue Mei
Cardiology
52sec home-news-image

Rescue of hypotensive shock

Low blood pressure is an important clinical symptom and diagnostic indicator of shock. Regardless of what causes the shock, the presence of low blood pressure, along with cold limbs, cold sweat, reduced urine output, and an indifferent expression, indicates insufficient peripheral vascular perfusion. Prolonged insufficient perfusion can lead to damage to vital organs. Therefore, timely emergency treatment is essential to elevate blood pressure and save the patient's life. The initial steps include administering oxygen to ensure the oxygenation of vital organs, replenishing blood volume, using vasopressors, and providing timely emergency treatment to save the patient's life.

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Written by Zhang Yue Mei
Cardiology
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What is the range for low blood pressure?

Blood pressure is an important indicator of human vital signs. Normal blood can meet the demands of human life activities and the blood supply to major organs. Too low blood pressure can severely affect human health and even endanger life. Normal blood pressure ranges from 90 to 140 mmHg for systolic and 60 to 90 mmHg for diastolic pressure. A systolic pressure below 90 mmHg and a diastolic pressure below 60 mmHg is considered low blood pressure. Diagnosis should also take into account underlying diseases, clinical symptoms, and other factors.

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home-news-image
Written by Zhang Yue Mei
Cardiology
45sec home-news-image

What is the range for low blood pressure?

Blood pressure below normal is clinically diagnosed as hypotension. Normal blood pressure ranges from 90 to 140 mm Hg systolic and 60 to 90 mm Hg diastolic. If the systolic pressure is below 90 mm Hg and the diastolic pressure is below 60 mm Hg, it is clinically diagnosed as hypotension. Symptoms of hypotension often include fatigue, dizziness, palpitations, shortness of breath, and darkening before the eyes. Mild hypotension may not present any clinical symptoms, while severe hypotension requires treatment based on clinical symptoms and the underlying disease to correct it.