“…5), it is clear that the RTV may not have great importance in myasthenic or LEMS patients who typically have pronounced clinical manifestations and a lot of jitter values well above the upper limits. 11,21,22,25 However, when the jitter is increased only slightly, as in mild clinical manifestations of myasthenia gravis, early stages of reinnervation, 9 myopathies, and Duchene dystrophies, 24 even one more abnormal jitter value may be important for the diagnosis. From the foregoing we conclude that, because of the RTV effect, special care should be taken in the interpretation of jitter results obtained from muscles with low reference jitter values of patients suffering from disorders that moderately affect the end-plate transmission.…”