Not a dumb question at all...

Satrina posed a good question... Why do people with heart defects need to take antibiotic pre-medication before visiting the dentist? The reason is bacterial endocarditis. I took this quote from The American Heart Association's website that could put it more eloquently than I can:

"Bacterial endocarditis is an infection of the heart's inner lining (endocardium) or the heart valves. This can damage or even destroy your heart valves.

How does it occur?

Bacterial endocarditis occurs when bacteria in the bloodstream (bacteremia) lodge on abnormal heart valves or other damaged heart tissue. Certain bacteria normally live on parts of your body, such as the mouth and upper respiratory system, the intestinal and urinary tracts, and the skin. Some surgical and dental procedures cause a brief bacteremia. Bacteremia is common after many invasive procedures, but only certain bacteria commonly cause endocarditis.

Who is at risk?

Endocarditis rarely occurs in people with normal hearts. However, if you have certain preexisting heart conditions, you're at risk when a bacteremia occurs. Some of these conditions include having...

an artificial (prosthetic) heart valve
a history of previous endocarditis
heart valves damaged (scarred) by conditions such as rheumatic fever
congenital heart or heart valve defects
hypertrophic cardiomyopathy (hi"per-TRO'fik kar"de-o-mi-OP'ah-the)

Some congenital heart defects, including a ventricular septal defect, an atrial septal defect, or a patent ductus arteriosus, can be successfully repaired surgically. After this you'll no longer be at increased risk for endocarditis. "

Just for the record, David had an atrial septal defect, which was successfully repaired, thus he no longer needs meds for the dentist. Samantha has a ventricular septal defect..well, actully she has two holes there, but not too large...where David had one big one that was making his right ventricle dangerously enlarged.

Thanks for asking! It was not a dumb question at all!