The Current Status and Clinical OUTcomes of Cardiogenic Shock Patients And the Role of Specialist in Cardiovascular Critical Care Unit

Inclusion Criteria: (prospective) 1. Patients over 19-year-old 2. Patients who are hospitalized in the cardiovascular critical care unit for cardiogenic shock or reduced blood pressure due to other causes. 2-1) In the event that the systolic blood pressure is less than 90mmHg for at least 30 minutes despite fluid treatment, or the use of vasopressor drug is required to maintain systolic blood pressure more than 90mmHg. 2-2) patients have at least one of the symptoms of peripheral tissue hypoperfusion (cold skin, urineoutput \< 30cc/ hour, decreased consciousness, lactate \> 2.0mmol/l) or pulmonary edema. 2-3) Patients supported by Mechanical Circulatory support device 3. Where the cause of a cardiogenic shock conforms to one or more of the following matters: 3-1) In the case of an intervention or surgery has been performed due to coronary artery disease, peripheral artery disease, venous thromboembolism, pulmonary artery disease, aortic disease, etc. 3-2) In the case of an intervention or surgery has been performed due to valve disease. 3-3) In the case of the insertion of an instrument in the heart is performed due to atrial defect, left atrium, arteriosclerosis, etc. 3-4) In the case of ablation or surgery, defibrillator implantation, and pacemaker implantation. 3-5) In the case of pericardiocentesis or window formation has been performed due to cardiac tamponade. 3-6) When monitoring is required for hypothermia therapy after spontaneous circulation recovery. 3-7) When monitoring is required after other heart-related procedures or surgery 3-8) When monitoring is required after heart transplant 4. Where a patient or legal representative voluntarily agrees to access medical records and data necessary for this study during the entire study period (retrospective) Patients over 19-year-old who treated in the cardiovascular critical care unit from January 1, 2018 to the IRB approval date for decreased blood pressure or needed intensive monitoring of vital signs. Exclusion Criteria: 1. A patient with irreparable brain damage. 2. If there are no witnesses outside the hospital during cardiac arrest. 3. DNR(Do Not Resuscitate) patients