What Is Acute Myocardial Infarction?

In daily life, we sometimes hear the term “acute myocardial infarction” (AMI) in hospitals but may not fully understand what this condition entails. So, what exactly is acute myocardial infarction?

What Is Acute Myocardial Infarction?

Acute myocardial infarction (AMI) results in acute ischemic necrosis of the myocardium—i.e., a sudden and severe reduction or complete interruption of coronary blood flow due to coronary artery disease, leading to prolonged, severe ischemia in the corresponding myocardial region and subsequent myocardial necrosis. Clinically, AMI presents with persistent, severe retrosternal chest pain, fever, elevated white blood cell count, increased serum cardiac biomarkers of myocardial necrosis, and progressive electrocardiographic (ECG) changes. Complications such as arrhythmias, cardiogenic shock, or heart failure may occur. AMI represents the most severe form of acute coronary syndrome (ACS).

Patients with acute myocardial infarction must remain strictly at bed rest in a quiet, undisturbed environment. Close monitoring of vital signs, continuous electrocardiography (ECG), and serial measurements of cardiac enzymes is essential to promptly detect clinical changes. Supplemental oxygen should be administered as needed. Analgesic and sedative medications—including morphine or pethidine—may be given for pain relief. Sublingual nitroglycerin is commonly used to dilate coronary arteries and is appropriate for most AMI patients; however, caution is warranted in those with significantly low blood pressure.

The above medications are for reference only; specific drug selection and dosing must be determined and supervised by a qualified physician. Additionally, individuals experiencing symptoms suggestive of AMI should seek immediate medical evaluation and treatment under professional medical guidance. We hope this information has been helpful!