Hi there -
Your concern is very understandable. The fact is that while there is no direct connection between bicuspid valve and seizures/fainting, there is an indirect and poorly understood statistical conncection between this (and several other interchangeable valve abnormalities) and vasovagal episodes (resulting in fainting and even seizure-like activity). While the valve abnormality is duly noted, it probably won't be figured into the equation when your husband is evaluated. However, he should be tested for vasovagal reflex (often now referred to as neurocardiogenic syncope). While there is no clear reason why these two things should co-exist, the often do. The testing would be to determine if your husband suffers from neurocardiogenic syncope, and a tilt-table test would be one of the big ones. I might also mention that some people who suffer from vasovagal reflex often have this happen when they've been exceptionally active and are very tired. They tend to doze off, fall deeply asleep, and almost seem to go into a partial seizure if disturbed.
If the cardiological study shows up nothing, a neurological workup might be next in order. I don't think this is a life-threatening problem (unless, of course, it were to occur when your husband was driving or something like that). Still, it is something that needs to be clarified. The fact that the bicuspid valve is present is more a marker than anything else, and is not, so far as I am aware, ever actually a cause of this sort of symptomology.
I hope this is helpful. Best of luck to you both, and please follow up here as needed.
John Kenyon, EMT, CCT
Non-invasive cardiology tech, Emergency and Critical Care technician, Critical Incident Stress Mgmt. specialist