En medicina, la hipotensión hace referencia a una condición anormal en la que la presión sanguínea de una persona es mucho más baja de lo usual, lo que puede provocar síntomas como vértigo o mareo. Usualmente dura unos pocos segundos o minutos.

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Hypotension is low blood pressure, especially in the arteries of the systemic circulation. Blood pressure is the force of blood pushing against the walls of the arteries as the heart pumps out blood. Hypotension is generally considered if systolic blood pressure less than 90 millimeters of mercury (mm Hg) or diastolic less than 60 mm Hg. However, in practice, blood pressure is considered too low only if noticeable symptoms are present. Hypotension is the opposite of hypertension, which is high blood pressure. It is best understood as a physiological state, rather than a disease. Severely low blood pressure can deprive the brain and other vital organs of oxygen and nutrients, leading to a life-threatening condition called shock. Though often associated with shock, hypotension is not necessarily indicative of it. For some people who exercise and are in top physical condition, low blood pressure is a sign of good health and fitness.For many people, excessively low blood pressure can cause dizziness and fainting or indicate serious heart, endocrine or neurological disorders.

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