Neurologic Causes of Cardiac Arrest and Outcomes

BackgroundSudden cardiac arrest as a complication of neurologic disorders is rare, occasionally acute neurologic events present with cardiac arrest as initial manifestation.ObjectiveOur aim was to describe neurologic disorders as a cause of cardiac arrest in order to enable better recognition.MethodsWe retrospectively analyzed prospectively collected resuscitation data of all patients treated between 1991 and 2011 at the emergency department after cardiac arrest caused by a neurologic event, including diagnosis, therapy, and outcomes.ResultsOver 20 years, 154 patients suffered cardiac arrest as a result of a neurologic event. Out-of-hospital cardiac arrest occurred in 126 (82%) patients, 78 (51%) were male, median age was 51 years (interquartile range 17 to 89 years). As initial electrocardiogram rhythm, pulseless electrical activity was found in 77 (50%) cases, asystole in 61 (40%), and ventricular fibrillation in 16 (10%) cases. The most common cause was subarachnoid hemorrhage in 74 (48%) patients, 33 (21%) patients had intracerebral hemorrhage, 23 (15%) had epileptic seizure, 11 (7%) had ischemic stroke, and 13 (8%) had other neurologic diseases. Return of spontaneous circulation was achieved in 139 (90%) patients. Of these, 22 (14%) were alive at follow-up after 6 months, 14 (9%) with favorable neurologic outcome, 8 of these with epileptic seizure, and most of them with history of epilepsy.ConclusionsSubarachnoidal hemorrhage is the leading neurologic cause of cardiac arrest. Most of the patients with cardiac arrest caused by neurologic disorder have a very poor prognosis.