Risk-stratifies syncope presentations using San Francisco, Canadian, and OESIL rules. Use when evaluating syncope, determining admission criteria, or risk-stratifying fainting episodes.
Risk-stratifies syncope presentations using validated clinical decision rules to determine disposition, identify high-risk cardiac etiologies, and document medical decision-making that supports admission or discharge decisions.
Why This Skill Exists
Syncope accounts for 1-3% of all emergency department visits and 1-6% of hospital admissions. The challenge is separating the 85% of patients with benign vasovagal or orthostatic syncope from the 10-15% with potentially life-threatening cardiac etiologies. Missed cardiac syncope carries a 6-month mortality rate of 10-30%. Conversely, unnecessary hospital admission for low-risk syncope wastes $2.4 billion annually in the United States alone.
Risk stratification tools exist to guide this decision, but their application requires understanding each tool's derivation population, validated endpoints, sensitivity, and specificity. No single rule is perfect—the San Francisco Syncope Rule (SFSR), Canadian Syncope Risk Score (CSRS), OESIL score, EGSYS score, and Boston Syncope Rule each have distinct strengths and limitations. This skill ensures systematic application and documentation.
Checkpoint A: Pre-Draft Intake (Mandatory)
相关技能
What were the exact circumstances of the syncopal event (position, activity, prodromal symptoms, witnesses)?
Was there true loss of consciousness with spontaneous recovery, or was this pre-syncope, seizure, or mechanical fall?
What are the patient's vital signs including orthostatic measurements (lying, sitting, standing at 1 and 3 minutes)?
Is there any history of structural heart disease, arrhythmia, heart failure, or family history of sudden cardiac death?
What medications is the patient taking (QT-prolonging drugs, antihypertensives, diuretics, antiarrhythmics)?
Was there any witnessed seizure activity, tongue biting, incontinence, or prolonged post-event confusion?
What does the ECG show (rhythm, intervals including QTc, axis, morphology, comparison with prior)?
Has hemoglobin, troponin, and BNP/NT-proBNP been obtained?
Documents to Request
12-lead ECG (current and any prior for comparison)
Orthostatic vital sign measurements with times
Complete medication list with dosages
Prior cardiac history and testing (echocardiogram, stress test, Holter/event monitor)
Witness statements if available
EMS documentation of on-scene findings and rhythm
Previous syncope evaluations
Family history documentation (especially sudden death age <50)
Step 1: Differentiate True Syncope from Mimics
Before applying risk stratification, confirm the event is true syncope (transient loss of consciousness due to cerebral hypoperfusion with rapid spontaneous recovery):
Diagnosis
Key Distinguishing Features
Action
True syncope
Brief LOC, spontaneous recovery, no post-ictal state
Driving restrictions counseled per state law (many states require 3-6 month event-free period)
Follow-up plan: PCP within 1-2 weeks, cardiology referral if indicated
Activity modifications if orthostatic (hydration, compression stockings, slow position changes)
Checkpoint B: Post-Draft Alignment (Mandatory)
Is true syncope confirmed and differentiated from seizure, presyncope, and mechanical fall?
Are at least two validated risk stratification tools applied and documented with scores?
Does the ECG interpretation address all syncope-specific high-risk patterns?
Is the disposition decision clearly supported by the risk stratification results?
For discharges, are return precautions and driving counseling documented?
Quality Audit
#
Criterion
Pass/Fail
1
True syncope vs. mimic differentiation documented
2
Orthostatic vital signs measured and recorded at 1 and 3 minutes
3
12-lead ECG obtained and systematically interpreted
4
At least one validated risk score calculated and documented
5
Cardiac history specifically queried (CAD, CHF, arrhythmia, valvular)
6
Family history of sudden cardiac death under age 50 assessed
7
Medication review for QT-prolonging and hypotensive agents completed
8
Exertional syncope specifically asked about and documented
9
Troponin obtained for intermediate/high-risk patients
10
Disposition supported by documented clinical reasoning
11
Driving counseling documented for discharged patients
12
Return precautions specific to syncope provided
13
Follow-up arranged with timeline specified
14
ECG compared to prior if available in system
Guidelines
Syncope in patients under 35 with exertion must prompt evaluation for HCM, ARVC, long QT, Brugada, and anomalous coronary arteries—these are leading causes of sudden cardiac death in young athletes
No single risk rule is sufficient—apply SFSR for 7-day events and CSRS for 30-day events, and reconcile conflicting results conservatively
Orthostatic vitals require 3 minutes of standing—measurements taken at 1 minute alone miss 25% of orthostatic hypotension cases
QTc must be calculated using Bazett correction and verified manually if heart rate is <50 or >100 (automated calculations are unreliable at extremes)
First-time syncope over age 60 warrants higher suspicion for cardiac etiology even with a normal initial workup—consider outpatient event monitor
Vasovagal syncope diagnosis is one of exclusion—document the positive features (prodrome, trigger, position) AND the absence of high-risk features
Recurrent syncope with negative workup may warrant tilt-table testing or implantable loop recorder discussion—document this in the discharge plan