Dr. K K Aggarwal, President Heart Care Foundation of India and Group Editor in Chief MEDtalks, will explain about hypotension in this video. Hypotension means low blood pressure. It is an important aspect of shock causing low blood pressure. By definition, it means less than 90mmHg of systolic blood pressure. He will also explain about relative hypotension where there is a drop of 40 mmHg of systolic pressure. Relative hypotension is the commonest cause of ischemia of kidneys. He will further explain about orthostatic hypotension too.