San Francisco Syncope Rule (CHESS)
San Francisco Syncope Rule (CHESS) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
Open the San Francisco Syncope Rule (CHESS) → Runs in your browser. No signup, no tracking.
What this is
San Francisco Syncope Rule (CHESS) is one of 230 deterministic tools in Sophie Well's Clinical Scoring & Risk group. San Francisco Syncope Rule (CHESS) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
When to use it
Use this tool when you need a quick, citable reference. Every calculation runs entirely in your browser - no inputs leave your device, no account is required, no AI is involved. The site enforces a strict Content Security Policy and ships no analytics or third-party CDN.
References
Quinn JV, Stiell IG, McDermott DA, Sellers KL, Kohn MA, Wells GA. Derivation of the San Francisco Syncope Rule to predict patients with short-term serious outcomes. Ann Emerg Med. 2004;43(2):224-232. Read the source ↗
Worked example: High risk for a serious 7-day outcome — CHESS positive: abnormal ECG, systolic BP < 90 mmHg.
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