Nine depressive patients were examined before bilateral electroconvulsive therapy (ECT), immediately after ECT, and 2 days later with saccadic, pursuit tracking, and Hallpike caloric vestibular tests. Before ECT, all tests showed normal results. Immediately after ECT, the saccadic test displayed dysmetria of the fast eye movements in six of nine patients. The pursuit tracking test showed decreased gain of the slow eye movements with compensatory saccades in seven of nine patients. These findings were for both directions in the horizontal plane. In the caloric vestibular test, the changes were not significant. Two days after ECT, the eye coordination and vestibular testing showed normal function. We conclude that the eye coordination and vestibular function disturbances induced by ECT are transient.
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