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Figure 4 Rates of Adverse Neurologic Events

The risk of stroke was greatest during the first month following device implantation, then it decreased to <0.1 strokes/patient (pt)-month on the device. Two patients in the OMT group had neurologic events (1 CVA, 1 TIA). TIA = transient ischemic attack; other abbreviations as in Figures 2 and 3.