Slow repetitive nerve stimulation in Lambert-Eaton myasthenic syndrome

Slow (3 Hz) repetitive nerve stimulation in Lambert-Eaton myasthenic syndrome, before and after brief exercise. In both situations, there is a prominent decrement. However, after brief exercise, the baseline compound muscle action potential (CMAP) is significantly larger compared with the CMAP before exercise. (Note that the y-axis is in microvolts for stimulation at rest, and in millivolts for stimulation postexercise). In this case, the CMAP increment after brief exercise was 2000 percent.