San Francisco Syncope Rule (SFSR)

ECG Findings

Hematocrit

Critical threshold: <30%

Blood Pressure

Clinical Guidelines

Sensitivity: 96% for serious outcomes

Specificity: 62% (Reduces admissions by 10-20%)

Serious Outcomes Include:

  • Arrhythmia requiring intervention
  • Myocardial infarction
  • Pulmonary embolism
  • Significant hemorrhage