question: My 2 year old son has had aortic stenosis since birth (bicuspid aortic valve) and pulmonary hypertension. He s already had a balloon valvoplasty (May 2014) when it was severe to critical. Since they said he was doing great with only mild regurgitation. Today he had two episodes of what I can only call convulsions, one followed by vomiting. And a third where he was unconscious. Could this be related to his AS or is it seizures?