My son is 14 bicuspid valve.with irregular heart beat.is there a connection between the two.his doctor is saying no.which i don't trust?

Probably not: Although it depends on how his valve is functioning.

Your doctor is right: An irregular heart beat or arrhythmia is caused by the electrical impulses that make your heart beat not working in a coordinated fashion. Bicuspid valve disease could be congenital. About 2 % of the population has it. It is twice as common in males than in females. Symptoms may not appear until later in life depending on the severity of the disease.