NYHA classification
Also written as: NYHA — New York Heart Association classification
New York Heart Association functional classification system rating heart failure symptoms from Class I (no symptoms) to Class IV (symptoms at rest).
Full Definition
The New York Heart Association (NYHA) functional classification is a standardized system for categorizing the severity of heart failure based on the patient's subjective assessment of symptoms and functional limitations. Class I indicates no symptoms with ordinary physical activity, Class II represents mild symptoms with ordinary activity, Class III denotes marked limitation with less than ordinary activity, and Class IV indicates symptoms at rest or with any physical activity. This classification system is widely used in clinical practice, research protocols, and treatment guidelines to assess functional status and guide therapeutic decisions in heart failure management.
Usage
Usage note: Use Roman numerals (I-IV) for NYHA classes; spell out 'New York Heart Association' on first use.
In Context
- "The patient's heart failure symptoms have progressed from NYHA Class II to Class III over the past six months." — Cardiology follow-up note
- "Enrollment in the clinical trial was limited to patients with NYHA Class II-III heart failure." — Research protocol documentation