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The San Francisco Syncope Rule was developed to identify syncope patients who could safely be discharged home without risk for serious short-term adverse outcomes. To evaluate the utility and performance of the rule in an Australian setting, researchers studied 89 adult patients with syncope or presyncope who were identified either prospectively when they presented to the emergency department (87%) or retrospectively by chart review (13%).
The rule classifies patients as high risk if they have any one of five features: abnormal electrocardiogram, hematocrit less than 30%, shortness of breath, history of congestive heart failure, or systolic blood pressure less than 90 mm Hg. In this study, serious adverse outcomes were defined as occurrence …