Inspiratory Muscle Training in Patients With Acute Myocardial Infarction

Inclusion Criteria: * age ≥ 18 years, patients with AMI undergoing primary PCI, admitted to cardiac intensive care unit and at a high pneumonia risk \[2 or more of the following parameters are regarded as high risk for pneumonia: 1. Age \> 55 years, 2. Diabetes mellitus, 3. Smoking at present, 4. Chronic kidney disease: estimated glomerular filtration rate \< 60 mL/min/1.73m2, 5. Forced expiratory volume in the first second of expiration (FEV1) \< 80% predicted and FEV1/forced vital capacity (FVC) \< 70% predicted\] * be able to understand and agree with informed consent Exclusion Criteria: * a history of cerebrovascular accident * treat with immunosuppressive medication for 30 days before * neuromuscular disorder * cardiovascular instability (such as aortic dissection or unstable hemodynamics) * a history of Coronary Artery Bypass Grafting (CABG) * expected survival is less than 6 months due to noncardiogenic disease * participated in other drugs and devices studies within 30 days * confirmed as ventricular aneurysm * other conditions not suit for the study after the discussion among the researchers (eg: poor compliance, unable to cooperate for the training)