Postural orthostatic tachycardia syndrome – Medicine MCQ

Postural orthostatic tachycardia syndrome is characterised by all except?
A. Women affected more commonly than men
B. Heart rate > 120/minute
C. Increase in heart rate > 30/minute when standing
D. Usually presents with orthostatic hypotension

Correct answer: D. Usually presents with orthostatic hypotension

Explanation:

  • Postural orthostatic tachycardia syndrome (POTS) is characterised by symptomatic orthostatic intolerance without orthostatic hypotension that is associated with either heart rate of more than 120/minute or increase of >30/minute when standing that subside on sitting / lying down.
  • The symptoms of orthostatic 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

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