Definition. Heart valves function to seal a chamber (closed) so blood can fill. When the chamber contracts the valve opens to allow blood to exit. When the valves do not function properly, we usually refer to a valve leaking or not closing correctly (insufficieny or regurgitation) or not opening correctly (stenotic). So when you describe the vavle being "sticky" can you describe it in these terms?
Generally not. Unless you are referring to bicuspid aortic valve which can be.