You are right to do some fact-finding for your own security and safety, and to help with your own symptom management and treatment if there is any beside symptom management. Your question is best put to an EP or a cardiologist. They know your record, especially recent test results that are going to paint a more truthful picture. Despite what you may have read about flecainide, it is widely used and widely tolerated. No, not by everyone, but it's like aspirin...widely used, not necessarily the best choice, and it might be absolutely wrong for you and some others who react poorly to it. Tell your cardiologist that you see that there is a suggestion of RBBB, and that you have read that flecainide is not a good fit generally. See what that person thinks.