The Canadian Cardiovascular Society (CCS) Severity of Atrial Fibrillation (SAF) Scale is analogous to the CCS Angina Functional Class.

The CCS-SAF scale is assessed based on 3 parameters:

AF-related symptoms (palpitations, dyspnea, dizziness/syncope, chest pain, weakness/fatigue)
Determination of symptom-rhythm correlation
Assessment of the effect of symptoms on function and quality of life

CCS-SAF scores range from 0 (asymptomatic) to 4 (severe impact of symptoms on quality of life and activities of daily living).

References

Dorian P, Cvitkovic SS, Kerr CR, Crystal E, Gillis AM, Guerra PG, Mitchell LB, Roy D, Skanes AC, Wyse DG.
A novel, simple scale for assessing the symptom severity of atrial fibrillation at the bedside: the CCS-SAF scale.
Can J Cardiol. 2006 Apr;22(5):383-6.