New screening tool to help physicians tell if a fainting episode heralds something serious

July 04, 2016

A simple nine-question tool could help emergency physicians uncover the sometimes dangerous hidden conditions that cause some people to faint, according to a study published today in CMAJ (Canadian Medical Association Journal).

Syncope, or fainting, accounts for between 1% and 3% of all emergency department visits. In most cases, it is benign, but it can sometimes be caused by serious health conditions. About 10% of patients who visit emergency departments for fainting experience a serious adverse event within 1 week to a month after their visit.

A team of researchers at The Ottawa Hospital and the University of Ottawa have created the Canadian Syncope Risk Score to help emergency doctors predict the risk of a patient experiencing an adverse event, such as potentially fatal irregular heart rhythm, heart attack and other cardiac events, gastrointestinal bleeding, and even death within a month after fainting.

"Fainting is a big problem," says Dr. Venkatesh Thiruganasambandamoorthy, an emergency physician and scientist at The Ottawa Hospital and an assistant professor at the University of Ottawa. "The way fainting patients are examined in emergency rooms varies greatly between physicians and hospitals. We hope that this screening tool will make the process more consistent and improve the detection of serious conditions related to fainting."

Researchers looked at 4030 patients from six Canadian hospitals including the Ottawa Hospital Civic and General Campuses, Ottawa; Kingston General Hospital and Hotel Dieu Hospital, Kingston, Ontario; and Foothills Medical Centre, Calgary, and University of Alberta Hospital, Edmonton. Of the total patients, 147 experienced a serious event in the month following discharge.

Dr. Thiruganasambandamoorthy and his team found eight factors that physicians can plug in to a screening tool. When combined, these factors give the patient's total risk of an adverse event, from very low to very high.

These factors include:

Most patients admitted to hospital for fainting do not need to be there, and can spend four to seven hours in the emergency department before a decision is made to discharge them.

"If our tool can discharge low-risk patients quickly and safely, then I think we can reduce emergency room wait times and open up those resources to other patients," said Dr. Thiruganasambandamoorthy.
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Canadian Medical Association Journal

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