This is a prognosis calculator.
Syncope Prognosis
There's a good table with clinical features and suggested causes of syncope in the reference (see footnotes).
1-Year Mortality Risk Factors
<-- Abnormal electrocardiogram
<-- Age older than 45 years
<-- History of congestive heart failure
<-- History of ventricular arrhythmia

30-Day Morbidity/Mortality Risk Factors (San Francisco Rule)
*30-day morbidity/mortality includes death, myocardial infarction, arrhythmia, pulmonary embolism, stroke, subarachnoid hemorrhage, significant hemorrhage, anemia requiring transfusion, procedural intervention to treat a related cause of syncope, or any condition that is likely to cause the patient to return to the emergency department
<-- Systolic blood pressure less than 90 mm Hg
<-- Shortness of breath
<-- Electrocardiogram: nonsinus rhythm or new changes present
<-- History of congestive heart failure
<-- Hematocrit level less than 30 percent

Interpretation --> Interpretationscore=(Q1)+(Q2)+(Q3)+(Q4)+(Q5)+(Q6)+(Q7)+(Q8)+(Q9);score>102?'15.2% with serious outcomes at 30 days & 27% 1-year mortality rate':score>101?'15.2% with serious outcomes at 30 days & 16% 1-year mortality rate':score>100?'15.2% with serious outcomes at 30 days & 9% 1-year mortality rate':score>99?'15.2% with serious outcomes at 30 days & 1% 1-year mortality rate':score>82?'15.2% with serious outcomes at 30 days & 27% 1-year mortality rate':score>81?'15.2% with serious outcomes at 30 days & 16% 1-year mortality rate':score>80?'15.2% with serious outcomes at 30 days & 9% 1-year mortality rate':score>79?'15.2% with serious outcomes at 30 days & 1% 1-year mortality rate':score>62?'15.2% with serious outcomes at 30 days & 27% 1-year mortality rate':score>61?'15.2% with serious outcomes at 30 days & 16% 1-year mortality rate':score>60?'15.2% with serious outcomes at 30 days & 9% 1-year mortality rate':score>59?'15.2% with serious outcomes at 30 days & 1% 1-year mortality rate':score>42?'15.2% with serious outcomes at 30 days & 27% 1-year mortality rate':score>41?'15.2% with serious outcomes at 30 days & 16% 1-year mortality rate':score>40?'15.2% with serious outcomes at 30 days & 9% 1-year mortality rate':score>39?'15.2% with serious outcomes at 30 days & 1% 1-year mortality rate':score>22?'15.2% with serious outcomes at 30 days & 27% 1-year mortality rate':score>21?'15.2% with serious outcomes at 30 days & 16% 1-year mortality rate':score>20?'15.2% with serious outcomes at 30 days & 9% 1-year mortality rate':score>19?'15.2% with serious outcomes at 30 days & 1% 1-year mortality rate':score>2?'0.3% with serious outcomes at 30 days & 27% 1-year mortality rate':score>1?'0.3% with serious outcomes at 30 days & 16% 1-year mortality rate':score>0?'0.3% with serious outcomes at 30 days & 9% 1-year mortality rate':'0.3% with serious outcomes at 30 days & 1% 1-year mortality rate'
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