ACCESS is an NHLBI funded multi-center research study that aims to determine the best method of care for survival and neurological recovery for patients resuscitated after cardiac arrest due to ventricular fibrillation (VF) outside of the hospital, but who have no evidence of a heart attack on electrocardiogram (ECG). 

ARREST is a research study that aims to determine the best method of care for patients with a shockable rhythm who respond poorly or not at all to CPR and medications after an out of hospital cardiac arrest.