If a patient has potential arrhythmic-sounding syncope and a noninducible type 2 or 3 Brugada ECG pattern, have we excluded Brugada syndrome as the etiology for their syncope?  

This is a complex question with a few nuanced components. The first component is qualifying an arrhythmic versus non arrhythmic cause of syncope. I would stress that this is based on generalization as there are no features that will provide absolute certainty for the nature of a single syncopal even...