How is cardiac function graded after myocardial infarction?

Generally, "MI" refers to myocardial infarction. After a myocardial infarction, cardiac function is classified into four grades: Grade I indicates no symptoms of heart failure; Grade II, mild symptoms; Grade III, severe symptoms of cardiac insufficiency; and Grade IV, cardiogenic shock. The details are as follows:

1. Grade I – No heart failure symptoms

In this stage, heart function is normal. The patient has no obvious cardiac symptoms and can continue with daily activities.

2. Grade II – Mild symptoms

Here, heart function is mildly impaired. The patient may experience mild shortness of breath, fatigue, and palpitations, and should avoid strenuous physical activity.

3. Grade III – Severe symptoms of cardiac dysfunction

At this stage, heart function is moderately impaired. The patient may have noticeable shortness of breath, fatigue, and palpitations, and can only perform light physical activities.

4. Grade IV – Cardiogenic shock

In this stage, heart function is severely impaired. The patient may suffer from severe shortness of breath, fatigue, and palpitations, and can only engage in very minimal physical activity.

In summary, the purpose of cardiac function classification is to better assess the patient's condition and formulate appropriate treatment plans to alleviate symptoms and improve quality of life. For patients with myocardial infarction, proactive prevention and treatment are essential, including modifying unhealthy lifestyle habits, medication, psychological interventions, and other measures to maintain heart health and a good quality of life. If a patient develops any discomfort or symptoms, it is recommended to seek medical attention at a hospital promptly.