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
