<prompt> Postural ohostatic tachycardia syndrome is characterized 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- symptomatic ohostatic intolerance without ohostatic hypotension, associated with either HR of 120min or increase in HR 30min 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. 