Early rhBNP on Myocardial Work in Patients With STEMI

Inclusion Criteria:

• 1. Anterior myocardial infarct (anterior myocardial infarct is defined as persistent chest pain for 30 mins at least, with ST-segment elevation of at least 0.2 mV in two or more contiguous precordial leads) within 12 hours after onsets of symptom;

  2. No contraindication for rhBNP;

  3. Left anterior descending (LAD) as culprit vessel, with TIMI 0-1 grade.

Exclusion Criteria:

• 1.Cardiogenic shock (systolic BP <90mmHg after fluid infusion or systolic BP<100mmHg after vasoactive drugs);

  2. History of myocardial infarct;

  3.Severe arrhythmia: with III degree A-V block ,atrial fibrillation,ventricular fibrillation,ventricular tachycardia;

  4. Any history of severe renal or hepatic dysfunction (hepatic failure, cirrhosis, portal hypertension or active hepatitis); neutropenia or thrombocytopenia; known acute pancreatitis;

  5. Pregnant or lactating;

  6. life expectancy≤12 months;

  7. Inability to follow the protocol and comply with follow-up requirements or any other reason the investigator feels would place the patient at increased risk;