This is a single center, prospective, randomized controlled study. All participants will be followed up until 30 days after randomized.
Pneumonia is uncommon high among patients with acute myocardial infarction (AMI), which increases adverse clinical events and prolongs the hospital stay. Inspiratory muscle training (IMT) is able to improve inspiratory muscle strength and prevent pneumonia in patients undergoing cardiac surgery including coronary artery bypass grafting. Thus, the investigators design the study mainly aim to evaluate the 30 days IMT for the change of inspiratory muscle strength, and also to observe its potentially effect on reducing pneumonia, in participants who accepted primary percutaneous coronary intervention (PCI) and at a high risk of pneumonia.