Clinical Research Directory

Inclusion Criteria: * 19 to 79 years old * Out-of-hospital-cardiac arrest providing resuscitation at the site and visiting the emergency department of the participating hospital or transporting from another hospital emergency room (EMS-treated OHCA) * The cardiac arrest event must not have been predicted for 24 hours before the incident Exclusion Criteria: * People who do not consent to personal information and blood supply for research * Trauma, submersion, poisoning, hanging, suffocation, or other causes of external causes directly contribute to the cardiac arrest * Patients with a terminal condition known to have no further treatment plans due to malignancy, neurological disease, respiratory disease, rheumatic disease, hematologic disease, renal disease or infectious disease. The terminal condition had to be checked by a doctor or recorded in medical records. * "Do not have a resuscitation" card or record issued by a doctor. * Hospice setting at the time of acute cardiac arrest for terminal illness or other reasons. * pregnant patient * With a family cannot provide information about patient * Without a family * Patients who were transported after admission at the other hospital * Foreign patients