Screening and diagnosis

Classification and risk stratification

Perioperative care

Quality improvement

Patient education

Nonpharmacologic interventions

Therapeutic procedures

Respiratory support

Follow-up and surveillance

Specific circumstances

Preventative measures

Medical management

Surgical interventions

Inpatient care

Diagnostic procedures

Diagnostic investigations

Insufficient evidence to make a recommendation.

Strongly favor this test or intervention.

The NYHA functional classification for heart failure, or New York Heart Association Functional Classification, is a scoring system used to quantify the severity of symptoms in patients with heart failure. This classification system is applicable to patients diagnosed with heart failure and is used to assess their functional capacity and limitations during physical activity. 

The NYHA classification is divided into four classes: Class I (no symptoms and no limitation in ordinary physical activity), Class II (mild symptoms and slight limitation during ordinary activity), Class III (marked limitation in activity due to symptoms, even during less-than-ordinary activity), and Class IV (severe limitations, experiences symptoms even while at rest).

The clinical utility of this calculator is to guide treatment decisions, assess prognosis, and evaluate the effectiveness of therapeutic interventions in patients with heart failure. It is also commonly used in clinical trials to stratify patients and measure outcomes. 

There are no specific exclusion criteria for its use, but it is subjective and relies on patient self-report, so it may not be as accurate in patients with cognitive impairment or communication difficulties.

NYHA functional classification for heart failure

# Criteria
 ## Physical ability
A. Patients with cardiac disease, but without limitation of physical activity. Ordinary physical activity does not cause undue fatigue, palpitation, or dyspnea.
B. Patients with cardiac disease resulting in slight limitation of physical activity. Comfortable at rest, but ordinary physical activity results in fatigue, palpitation, or dyspnea.
C. Patients with cardiac disease resulting in marked limitation of physical activity. Comfortable at rest, but less than ordinary activity causes fatigue, palpitation, dyspnea or anginal pain.
D. Patients with cardiac disease resulting in inability to carry on any physical activity without discomfort. Symptoms of heart failure at rest, if any physical activity is undertaken, discomfort increases.

# Conditions
- A
- B
- C
- D
- true