What is the definition of hypotension?

Hypotension is defined as abnormally low blood pressure, which can result in various symptoms such as dizziness or fainting. Blood pressure is measured using two readings: systolic (the pressure in blood vessels when the heart beats) and diastolic (the pressure when the heart is at rest). When these readings fall below the normal range, typically considered to be around 90/60 mmHg or lower, a person is diagnosed with hypotension. The condition can be caused by several factors, including dehydration, prolonged bed rest, certain medications, or underlying health issues. Recognizing hypotension is crucial because it can lead to inadequate blood flow to vital organs, impacting overall health.

The other choices refer to high blood pressure, normal blood pressure, and blood pressure within the normal range, which are unrelated to the definition of hypotension.