<prompt> Postural ohostatic tachycardia syndrome is characterised by all except?Women affected more commonly than menHea rate 120minuteIncrease in hea rate 30minute when standingUsually presents with ohostatic hypotension  <response>: Postural ohostatic tachycardia syndrome POTS is characterised by symptomatic ohostatic intolerance without ohostatic hypotension that is associated with either hea rate of more than 120minute or increase of 30minute when standing that subside on sitting lying down. The symptoms of ohostatic intolerance include lightheadedness, blurred vision, palpitation and nausea. Usually affects women more than men. This syndrome develops between 15 and 50 years of age. Reference: Harrisons Principles of Internal Medicine, 20th edition, p3164 