Hypotension is clinically defined as systolic blood pressure below 90 or diastolic blood pressure below 60. Slight variations in these figures are normal, and very fit people may have unusually low blood pressure. So it’s important to take into account the patient’s full condition, not just their blood pressure. When a patient has other symptoms, such as dizziness or fainting, hypotension may signal a serious or even life-threatening ailment. If you encounter a hypotensive patient, here’s what you need to know to administer proper treatment.