AsthmaBMJ 2010; 341 doi: http://dx.doi.org/10.1136/bmj.c3779 (Published 21 July 2010) Cite this as: BMJ 2010;341:c3779
This week’s question is on asthma and is taken from the OnExamination revision questions for the MRCP Part 1 exam.
Which of the following signs and symptoms, if any, indicate a severe asthmatic attack in a teenager?
A A peak expiratory flow rate of less than 50% of predicted rate
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