It is a clinical condition in which blood pressure decreases in the arteries of systemic circulation. Main cause of hypotension is low blood volume, hormonal changes, broadening of blood vessels, side effects of medicine, anaemia, or other heart problems. If blood pressure is lower than 120/80 mm/Hg then it is said to be hypotension. Symptoms of hypotension are fainting, seizures, chest pain and shortness of breath.