Inclusion Criteria:  Patients aged 18-85 years with AMI (STEMI or NSTEMI) and shock stage B (SCAI definition criteria) Plan to implement revascularization (PCI or CABG) Hypotension: SBP < 90mmHg or map < 60mmhg or decrease > 30mmhg from baseline, more than 30min under the condition of sufficient blood volume; (4) No signs of hypoperfusion (if one of the following conditions is met):1) Good mental state; 2) The extremities were warm without cold and wet; 3) Lactic acid ≤ 2 mm; 4) Normal renal function or mild renal impairment (creatinine increase less than one time or GFR decrease ≤ 50%.  Exclusion Criteria:  Age > 85 CPR > 30 min Stage C-E in SCAI shock definition criteria Acute pulmonary embolism Mechanical complications, such as ventricular septal perforation, acute mitral regurgitation Non-drug induced severe central nervous system dysfunction Other causes of shock, such as septic shock, hemorrhagic shock, ketoacidosis Aortic insufficiency above grade II Difficulty in IABP implantation due to severe peripheral vascular disease Combined with other serious diseases and life expectancy < 12 months Refusal to sign the informed consent