References:
Fitness to fly for passengers with cardiovascular disease, The report of the working group of the British Cardiovascular Society, Heart 2010;ii1-ii16. doi:10.1136/hrt.2010.203091
Coker, R. K., Armstrong, A., Church, A. C., Holmes, S., Naylor, J., Pike, K., Saunders, P., Spurling, K., & Vaughn, P. (2022). BTS Clinical Statement on air travel for passengers with respiratory disease. Thorax, 10(1136), 1-22.
Medical manual. IATA. https://www.iata.org/en/publications/medical-manual/. Published July 12, 2020. Accessed September 8, 2022.
Managing passengers with stable respiratory disease planning air travel: British Thoracic Society recommendations. Thorax, Sept. 2011, Vol 66, Supplement 1.
Thibeault C, Evans AD, Dowdall NP. Asma Medical Guidelines for air travel: Fitness to fly and Medical Clearances. Aerospace Medicine and Human Performance. 2015;86(7):656-656. doi:10.3357/amhp.4222.2015.
NYHA: New York Heart Association NYHA Class Symptoms
I No symptoms and no limitation in ordinary physical activity, e.g. no shortness of breath when walking, climbing stairs etc.
II Mild symptoms (mild shortness of breath) and slight limitation during ordinary activity.
Ill Marked limitation in activity due to symptoms, even during less-than-ordinary activity, e.g. walking short distances (20-100 m). Comfortable only at rest.
IV Severe limitations. Experiences symptoms even while at rest. Mostly bedbound patients.