Interactive San Francisco Syncope Rule (CHESS) calculator. Requires the calculator gadget.
Usage: {{SF Syncope Calculator}}
San Francisco Syncope Rule
San Francisco Syncope Rule (CHESS)
| Criteria (CHESS)
|
No
|
Yes
|
| C — History of CHF
|
1
|
|
| H — Hematocrit <30%
|
1
|
|
| E — Abnormal ECG (new changes or non-sinus rhythm)
|
1
|
|
| S — Shortness of breath
|
1
|
|
| S — Systolic BP <90 mmHg at triage
|
1
|
|
| Risk Factors
|
/ 5
|
| Interpretation
|
| 0
|
Low risk — 2% risk of serious outcome at 30 days. Consider discharge with outpatient follow-up.
|
| ≥1
|
Not low risk — Cannot be classified as low risk. Consider further workup or admission.
|
| References
|
- Quinn JV, Stiell IG, McDermott DA, et al. Derivation of the San Francisco Syncope Rule. Ann Emerg Med. 2004;43(2):224-232. PMID 14747812.
- Quinn JV, Stiell IG, McDermott DA, et al. The San Francisco Syncope Rule vs physician judgment and decision making. Am J Emerg Med. 2005;23:782-786.
- Note: Sensitivity ~98% for serious outcomes. Some validation studies show lower performance. Use with clinical judgment.
|
