Wu et al reported the SACAF score for evaluating patients with out-of-hospital cardiac arrest. This can help to identify a patient at risk for ventricular tachyarrhythmia. The authors are from multiple institutions in Taiwan.
SACAF is an acronym for sex, age, cardiovascular disease and atrial fibrillation.
Outcome: ventricular tachycardia or fibrillation with out-of-hospital cardiac arrest (OHCA)
Predictors:
(1) male sex (OR 2.5)
(2) age <= 65 years (OR 2.8)
(3) history of cardiovascular disease (OR 3.0)
(4) atrial fibrillation (OR 2.4)
SACAF score =
= number of predictors present
Interpretation:
• minimum score: 0
• maximum score: 4
• A score >= 2 can discriminate VT/VF from other causes of OHCA with sensitivity of 0.75 and specificity of 0.60.
SACAF Score
Percent VT/VF
0
0%
1
10%
2
20%
3
50%
4
68%
Performance:
• The area under the ROC curve is 0.74.
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