I had a cardiac catherization 10 years ago to see the size of my patent ductus artereosis. it was very small so it was left as is. my cardiologist had no concern and i was never prescribed any medications. i had no other follow up after that. now, i am 27

It may be fine: it is time to see the cardiologist again to confirm your cardiac status. This may not be a problem at all, or may have closed on his own, but you need to get this clarified.

Likely all ok: a small PDA present at age 17 is likely going to remain small and unobtrusive for life. If concerned about it, a good cardiac exam with the stethoscope, an electrocardiogram (electrical tracing of the heart) and an echocardiogram (ultrasound of the heart) can give you the assurance that you need. Much of that might be overkill, however. I suspect you are just fine.

Patent ductus A: It is a small duct like connection between aortic arch and the left branch or main pulmonary artery. If you are asymptomatic with no shortness of breath, chest pain, fever, palpitations , dizziness,blacking out feeling etc, it means the PDA is insignificant in size. In patients in whom still open, chances of infection of the duct can happen when there is high level of shunt from aorta to pulm. A

Still healthy?: I'm not a cardiologist but as I understand it, a PDA would cause increase in the workload of the heart only if it's large enough. So if your cardiologist had no concern 10 years ago, and you have been healthy, you shouldn't be concerned about it either. Just for your peace of mind, next time you have a physical check up with your doctor, mention it so he/she can check your heart out.

PDA: Small PDA that your cardiologist has no concern is a good thing. You do not need any medicine for that. Usually does not cause any heart troubles, unlike moderate or large PDA's that can result in heart failure. Very remotely small PDA's can have infection in it as it happens inside the heart called endocarditis. Your cardiologist will monitor your heart condition. Don't do IV drugs.

PDA: chances are its closed or insignificant, should really see the cardiologist for an updated evaluation