What are the 10 signs of low blood pressure

What causes low blood pressure (hypotension)?

Definition of low blood pressure

• Low blood pressure (hypotension), is defined as a systolic blood pressure (SBP) below 90 mmHg (or a mean arterial pressure (MAP) below 60 mmHg).

Low blood pressure might cause no symptoms that you notice.

Or it might cause dizziness and fainting. Sometimes, low blood pressure can be life-threatening.

Almost all causes of low blood pressure are serious and need treating soon.

In this article, we will review the common causes of low blood pressure.

Hypotension can be broadly categorised into five main groups:

• Hypovolaemia (fluid loss; e.g.

  Low bp range

• Low bp range
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dehydration, bleeding, burns, pancreatitis)

• Cardiac (poor heart function)
• Vasodilation (widening of blood vessels) – especially sepsis (severe infection); and medication
• Anaphylaxis (severe allergy)
• Hypoadrenalism (underactive adrenal glands, e.g.

  caused by Addison’s Disease, or withdrawal of steroid tablets).