Good Morning, I am new to these forums and I am seeking some information. I apologize if this is posted in another thread but I searched and no results came up. Is anyone on here familiar with an incomplete right bundle branch block? Is it medically disqualifying? My DS is a varsity cross country and track athlete and has never had any cardio/respiratory issues however when he had the flu, he got up quickly from the couch and fainted, he came to quickly but we took him to ER where he had labs and an EKG done. All labs were normal but this issue of the IRBBB came up. We are following up with a cardiologist of course and the ER doctor said "don't lose sleep" over it but I was hoping someone on here could shed some light?