This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous QBank, Subject name: Medicine
[{'content': 'Postural ohostatic tachycardia syndrome is characterized by all except? \nSelect and explain. \nA. Women affected more commonly than men, B. Hea rate > 120/minute, C. Increase in hea rate > 30/minute when standing, D. Usually presents with ohostatic hypotension', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Postural ohostatic tachycardia syndrome (POTS)- symptomatic ohostatic intolerance without ohostatic hypotension, associated with either HR of >120/min or increase in HR >30/min 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.', 'role': 'assistant'}]