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NYHA stages

German: NYHA-Klassifikation

Named after the New York Heart Association

1 Definition

The NYHA stages is a scale that is applied to grade and classify heart failures into well defined stages. The NYHA stage is a commonly used score that helps to choose the proper treatment for heart failures.

2 NYHA stage I

There is no impediment to movement or performance. Complete absence of symptoms or ailments under stress even though a cardiac disease has been diagnosed.

3 NYHA stage II

Slightly reduced resilience under pressure. No symptoms present while at rest or light stress. Increased stress leads to appearance of symptoms.

4 NYHA stage III

Severe reduction of resilience under pressure. Symptoms already become present even with light increase of stress.

5 NYHA stage IV

Symptoms are constantly present, even when at rest.

The following symptoms are used in order to consistently stage the heart failure:

6 Treatment

The drug treatment of heart failure is made dependent on the NYHA stage of the condition. The following classes of drugs are administered dependent on the stage:

Cardiac glycosides and diuretics do not directly improve the outcome, but help ease the symptoms.

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