Will trivial mitral regurgitation worsen as age advances?

It can: Mitral (MI-tral) valve prolapse (MVP) is a condition in which one of the heart's valves, the mitral valve, doesn't work properly. The flaps of the valve are "floppy" and don't close tightly. Much of the time, MVP doesn't cause any problems. Rarely, blood can leak the wrong way through the floppy valve, which may cause shortness of breath, palpitations (strong or rapid heartbeats), or chest pain.