CCS-SAF Symptom Score

Canadian Cardiovascular Society (CCS) Severity of Atrial Fibrillation (SAF) scale describes severity of symptoms in atrial fibrillation.

Class 0

Asymptomatic with respect to atrial fibrillation (AF)

Class 1

Symptoms of AF have minimal effect on quality of life

• Minimal or infrequent symptoms
• Single episode of AF without syncope or heart failure

Class 2

Symptoms of AF have minor effect on quality of life

• Mild awareness of symptoms in patients with persistent or permanent AF
• Rare episodes (less than a few per year) in patients with paroxysmal or intermittent AF

Class 3

Symptoms of AF have moderate effect on quality of life

• Moderate awareness of symptoms on most days with persistent or permanent AF
• More common episodes (more than every few months) or more severe symptoms, or both in patients with paroxysmal or intermittent AF

Class 4

Symptoms of AF have severe effect on quality of life

• Very unpleasant symptoms in patients with persistent or permanent AF
• Frequent or highly symptomatic episodes in patients with paroxysmal or intermittent AF
• Syncope due to AF
• Heart failure due to AF

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