Cardiac function classification is a clinical method used to assess the degree of impairment of cardiac function, commonly used are NYHA classification, Killip classification and other methods.
1.NYHA classification: applicable to simple left heart failure.
(1) Grade I: organic heart disease, general physical labor is not restricted.
(2) Grade II: with organic heart disease, general physical labor is mildly restricted, and symptoms of fatigue, shortness of breath, and angina pectoris may occur.
(3) Grade III: with heart disease, general physical labor is significantly restricted, and symptoms of fatigue, shortness of breath, and angina pectoris will occur with less than general physical labor.
(4) Class IV: Symptoms of cardiac insufficiency may occur even at rest, and general physical labor may aggravate the symptoms.
2. Killip classification: applicable to the case of acute myocardial infarction.
(1) Class I: no symptoms of heart failure and cardiac insufficiency.
(2) Grade II: Symptoms of cardiac insufficiency, with a range of wet lung sounds less than 50% of the lung fields.
(3) Grade III: Severe heart failure with wet lung rales greater than 50% of the lung field.
(4) Class IV: cardiogenic shock with hypotension, oliguria and cyanosis.
There are also grading methods such as Forrest and Weber for grading cardiac function, and the appropriate grading needs to be selected according to the condition.