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Back| Class | Description |
|---|---|
| Class I | No limitation of usual physical activity. Ordinary physical activity does not cause undue dyspnea or fatigue, chest pain, or near syncope. |
| Class II | Mild limitation of physical activity. No discomfort at rest, but ordinary physical activity causes undue dyspnea or fatigue, chest pain, or near syncope. |
| Class III | Marked limitation of physical activity. No discomfort at rest, but less than ordinary activity causes undue dyspnea or fatigue, chest pain, or near syncope. |
| Class IV | Inability to carry out any physical activity without symptoms. Signs of right heart failure. Dyspnea and/or fatigue may be present at rest, and discomfort is increased by any physical activity. |
Description
Used for clinical symptom assessment of patients with pulmonary hypertension. For untreated idiopathic or hereditary pulmonary hypertension patients, the median survival time for WHO-FC Class IV is 6 months, for WHO-FC Class III is 2.5 years, and for WHO-FC Class I or II is 6 years.
