The most sensitive test for the diagnosis of ‘ myasthenia gravis is
Correct Answer: Positive edrophonium test
Description: *Tensilon (edrophonium) test: a sho-acting anticholinesterase--look for rapid and transient improvement of strength; false-positive (placebo response, motor neuron disease) and false-negative tests occur. Atropine IV should be on hand if symptoms such as bradycardia occur. Ref Harrison20th edition pg 2378
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