Blakester526,
Anyone with LBBB must have a thorough cardiac workup. LBBB most often occurs in patients with underlying heart disease and may be associated with progressive conducting system disease. However, LBBB can also be seen in asymptomatic patients with a structurally normal heart.
The presence of LBBB can interfere with the interpretation of exercise testing. It also can result in left ventricular dyssynchrony, thereby reducing the measured left ventricular ejection fraction. So the results of cardiac testing have to be correlated with the patient's examination.
You should ask these questions of your cardiologist. Not everyone with LBBB has a problem, but the only way to know is to thoroughly examine the patient and his/her studies. The only person who can do this is your own cardiologist.
There is an extremely large amount of information on LBBB on the internet. All you have to do is google "LBBB". But, again, everyone is different. Some of the information may apply to your cases, while the rest has nothing to do with you.
So, you really need to sit down with your cardiologist and ask all the question you want. Good luck.