Introduction

The incidence of cardiac aress in the united states is about 600 thousand patients per year. Despite advances in pre hospital care and hospital management, the prognosis remains poor with only ten to 20 % of patients surviving to hospital discharge. The primary determinant of mortality after cardiacores is hypoxic aschemic brain injury or withdrawal of life's sustaining therapy due to perceived poor nerologic prognosis. Neurologists can improve care by identifying and preventing secondary brain jury,. identifying patients at risk for brain death, which occurs enough to ten percent of cardiacores patients.