Prologue Syncope prognostication, risk assessment, and disposition continue to be worrisome concerns. This is partly due to concerns that uncommon but dangerous causes may be missed, and at times due to assessment of possibly vulnerable populations. Syncope assessment in the emergency department poses a combination of challenges including limited background knowledge of the patient, time limitations, a high stress environment, and the concern that up to 10% of patients may have an arrhythmic etiology. Syncope assessment in pregnancy is challenged by a complete lack of information, and in children by worries that rare genetic causes may be missed. Focused background Fortunately new work, largely Canadian, provides help. Funded in part by the Canadian Arrhythmia Network, we have a strongly evidence-based risk assessment tool for emergency departments, and national and provincial data on health services epidemiology and outcome that are unrivalled elsewhere. Similarly we have a unique and ground-breaking large study of outcomes of pregnant moms and kids with worrisome findings, and unique data on health services epidemiology and outcome of children with syncope. What we will do We will use the minidebate format to highlight the strengths and limitations of syncope risk scores in the emergency department, and outcomes of pregnant moms and children with syncope. Not all outcomes are benign in any of the groups, and co-morbidities are high. Debate 1: Moms and kids who faint: Don’t worry, be happy? (Drs Chatur and Roston) Debate 2: Syncope risk scores do work (Drs Thiruganasambandamoorthy and Sandhu) The debates will have 8-minute presentations with 2-minute rebuttals, for a total of 20 minutes each. They will be followed by 10-minute Question and Answer periods. Speakers Canada has a vibrant syncope investigators community, and our speakers comprise international experts and new stars. Drs Sandhu and Thiruganasambandamoorthy have both published foundational work in syncope assessment and outcomes, and Drs Roston and Chatur have both published important work on syncope assessment and outcomes in vulnerable young populations, including pregnancy.