Cardiac Arrest Survivors Preserved Ejection fraction Registry (CASPER) 
Health information about sudden cardiac arrests (a sudden stopping of the heart) and sudden unexpected death. This will help doctors and researchers better figure out who is at risk of sudden cardiac arrest and sudden death. Optionally, participants may provide a blood sample used for further research.

  • Who can participate?
    People who have had a sudden cardiac arrest or sudden unexpected death, as well as their first-degree family members (biological mother, father, full siblings, and children)

Perceived executive functioning, behavior and socio-emotional functioning in children and adolescents with SVT
Through questionnaires answered by children with SVT—a type of irregular heart rhythm where the top part of the heart beats very fast—and their parents about their executive functions (thinking skills that allow for planning, organization and decision making), behaviour, social and emotional skills, as well as the severity of their SVT.

  • Who can participate?
    Boys and girls 7-18 years old who have experienced SVT in the last year, who have not had an electrophysiology study and ablation treatment for their SVT

This study is looking for the best treatments for infants with SVT—which causes a fast heart rate in the top part of an infant’s heart—when a medicine called adenosine and special movements called Vagal manoeuvres don’t work. This study will review medical records and have a phone call follow-up about the infant’s treatment for SVT. BC Children’s Hospital is one of many sites that are participating in this study.

  • Who can participate?
    Infants less than 1 year old who experience a specific form of SVT called atrioventricular re-entrant tachycardia (AVRT) or atrioventricular nodal re-entrant tachycardia (AVNRT)

The Cardiac Arrests and Stressful, Chronic, Adverse Events (CASCADE and CASCADE-Peds) Study
This study aims to investigate possible connections between life stress and sudden cardiac arrests (SCA) using surveys and questionnaires.

  • Who can participate?
    People under the age of 60 who have had a SCA and a control group of people less than 60 years old who have never experienced SCA and have a functionally and structurally normal heart.

SEARCH: Study Evaluating Adolescents for Risk factors associated with Cardiovascular Health
A questionnaire study to evaluate cardiac risk factors and lifestyle choices including diet and physical activity in teens with and without congenital heart disease and their parents.

  • Who can participate?
    Boys and girls 8-19 years old with a cardiac diagnosis or a healthy heart, who are able to answer questions about their physical activity and lifestyle habits.

 For more information about electrophysiology research, or if you think you or your child might be interested in participating in one of these studies, please contact the electrophysiology research team at or 604-875-2345 (ext. 7955).