Postural ohostatic tachycardia syndrome is characterised by all except?

Postural ohostatic tachycardia syndrome (POTS) is characterised by symptomatic ohostatic intolerance without ohostatic hypotension that is associated with either hea rate of more than 120/minute or increase of >30/minute 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: Harrison's Principles of Internal Medicine, 20th edition, p3164