There is a relatively high incidence of perioperative neurocognitive disorders（PND） after surgeries, and the incidence is even higher in the geriatric population undergoing cardiac surgery. Nevertheless, there remains no effective medication or intervention been approved in PND. It has been shown that brain stimulation can improve cognitive function in mild cognitively impaired patients. However, the effects on cognitive function in PND remain uninvestigated.
To investigate the impact of rTMS on the incidence of perioperative neurocognitive disorders in patients after after cardiac surgerysurgery. To explore the underlying mechanisms behind the efficacy.