CardiologyCriteria

New York Heart Association (NYHA) Functional Classification

Classifies heart failure severity based on functional limitation. NYHA class correlates with mortality, guides therapy intensity, tracks treatment response, and affects clinical trial eligibility.

Parameters

NYHA Functional Class

Class I — No Functional LimitationOrdinary physical activity causes no undue fatigue, dyspnea, or palpitations. No symptoms with normal activity.Class II — Mild LimitationComfortable at rest. Ordinary activity (walking > 2 blocks, climbing stairs) results in dyspnea, fatigue, palpitations, or angina.Class III — Moderate LimitationComfortable at rest. Less than ordinary activity (walking 1–2 blocks, climbing 1 flight) causes symptoms. Marked limitation of physical activity.Class IV — Severe Limitation / Symptoms at RestSymptoms occur at rest. Any physical activity causes discomfort. Unable to carry on any physical activity without symptoms — unable to perform ADLs without dyspnea.

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CardiologyCriteria

New York Heart Association (NYHA) Functional Classification

Classifies heart failure severity based on functional limitation. NYHA class correlates with mortality, guides therapy intensity, tracks treatment response, and affects clinical trial eligibility.

Parameters

NYHA Functional Class

Class I — No Functional LimitationOrdinary physical activity causes no undue fatigue, dyspnea, or palpitations. No symptoms with normal activity.Class II — Mild LimitationComfortable at rest. Ordinary activity (walking > 2 blocks, climbing stairs) results in dyspnea, fatigue, palpitations, or angina.Class III — Moderate LimitationComfortable at rest. Less than ordinary activity (walking 1–2 blocks, climbing 1 flight) causes symptoms. Marked limitation of physical activity.Class IV — Severe Limitation / Symptoms at RestSymptoms occur at rest. Any physical activity causes discomfort. Unable to carry on any physical activity without symptoms — unable to perform ADLs without dyspnea.

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