During the clinical stay, pertinence clinical data will be collected including recurrent cardiac arrests, need for coronary angiography or revascularization more than 24 hours from admission, or implantation of an implantable cardioverter-defibrillator prior to discharge. Other significant clinical events will also be recorded including need for transfusion or other surgeries. A SCAI risk score22 will be calculated from the collected data by a study investigator or coordinator within 24 hours of admission. If the patient dies prior to discharge, the date and cause of death will be noted. Transfer to hospice or referral for comfort care will be recorded. If the patient is discharged alive, a Glasgow-Pittsburgh Cerebral Perfusion Category as a measurement of neurological function at time of discharge will be assessed. Disposition site (home, hospice, skilled nursing facility, or transfer to higher level of care) will be recorded. Thirty day follow-up will be performed by review of the medical record, review of public death records, or phone call as appropriate to assess vital status. If a recorded height or weight is not available within the first 24 hours, then estimations by either the staff caring for the patient or study coordinator may be used. The study will only collect data and will not include interaction with subjects.