Canadian Syncope Risk Score (CSRS)

Estimate prognosis among patients presenting to emergency with syncope

The global unit selector only affects unanswered questions
1.Predisposition to Vasovagal Symptoms?
2.History of Heart Disease?
3.Any Systolic Pressure Reading <90 or >180 mm Hg
4.Elevated Troponin Level?
5.Abnormal QRS Axis (<–30° or >100°)?
6.QRS Duration >130 ms?
7.Corrected QT Interval >480 ms?
8.Diagnosis in Emergency Department of Vasovagal Syncope?
9.Diagnosis in Emergency Department of Cardiac Syncope?
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1. Predisposition to Vasovagal Symptoms?

More Information

Triggered by being in a warm crowded place, prolonged standing, fear, emotion or pain.

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About this Calculator

This risk calculator was derived from 4,030 patients with syncope and is currently undergoing validation. The risk score will estimate the probability of serious adverse event including arrhythmia and death within the next 30-days. The score can be used to identify the medium and high-risk patients. Once validated, it could be used for quick disposition of low-risk patients.

If the score indicate medium or high-risk, patients should be carefully evaluated for detecting serious underlying conditions such as hemorrhage, pulmonary embolism or myocardial infarction. If no serious conditions are detected and patient is being discharged home, it might be reasonable to apply an out-of-hospital external cardiac monitor on these patients. Depending on local factors (health care system and the litigation risk) and patient factors, hospitalization can be considered for high-risk patients using a shared-decision model.

In the study cohort 6.7% of patients were classified as high-risk (score ≥4).

Submitted and developed in co-operation with study first author Venkatesh Thiruganasambandamoorthy.


Thiruganasambandamoorthy V et al.

Development of the Canadian Syncope Risk Score to predict serious adverse events after emergency department assessment of syncope.

CMAJ: Canadian Medical Association Journal, Journal de L'Association Medicale Canadienne 2016 September 6, 188 (12): E289-E298

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