Inclusion Criteria:  Non-traumatic cardiac arrest, hypotension, intensive care transport where an attempt of resuscitation and treatment is considered appropriate in patients age ≥18 years.  Exclusion Criteria:  Age <18 years.  Traumatic cardiac arrest Known pregnancy (can be included in the hypotension group) Victim not to be resuscitated (DNR orders) Internals in prison Included once in the study already Patients too small for LUCAS 2-AD2 < 18.5 cm chest height Patient too big for LUCAS 2-AD2 > 27.3 cm chest height Chest or upper abdomen surgery (Large scars on the chest, only in the CPR group. Sustained Restoration Of Spontaneous Circulation (ROSC) occurring before the LUCAS 2-AD2 can be applied to the patient, such that further CPR is not needed