Hypotension is abnormally low blood pressure and is the opposite of high blood pressure condition also known as hypertension.
Blood pressure is known as the force of blood pushing against the walls of the arteries as the heart pumps out blood. It is a measurement of the pressure in your arteries during the active and resting phases of each heartbeat.
Here’s what the numbers mean:
Systolic pressure: The first (top) number in a blood pressure reading, this is the amount of pressure your heart generates when pumping blood through your arteries to the rest of your body.
Diastolic pressure: The second (bottom) number in a blood pressure reading, this refers to the amount of pressure in your arteries when your heart is at rest between beats.
Current guidelines identify normal blood pressure as lower than 120/80 mm Hg; in hypotension blood pressure is lower than 90/60 mmHg.
Different Types of Hypotension:

  • Orthostatic Hypotension
    You may feel dizzy or light-headed or may even faint and this usually occurs if you get up suddenly from a sitting or lying down position.
  • Neurally Mediated Hypotension
    If you have neurally mediated hypotension (NMH) your blood pressure can drop suddenly if you have been standing for a long time. You may feel dizzy, faint, or sick to the stomach as a result. NMH also can occur as the result of an unpleasant, upsetting, or scary situation.
  • Severe Hypotension Linked to Shock
    Shock is a life-threatening condition in which blood pressure drops so low that the brain, kidneys, and other vital organs can’t get enough blood to work well. Blood pressure drops much lower in shock than in other types of hypotension.