Complications

Congenital heart disease complications that might develop years after you receive treatment include:

• Irregular heartbeats (arrhythmias). Arrhythmias occur when the electrical signals that coordinate your heartbeat don't work properly. Your heart may beat too fast, too slowly or irregularly. In some people, severe arrhythmias can cause stroke or sudden cardiac death if not treated. Scar tissue in your heart from previous surgeries can contribute to this complication.
• Heart infection (endocarditis). Endocarditis is an infection of the inner lining of the heart (endocardium). It generally occurs when bacteria or other germs enter your bloodstream and move to your heart. Untreated, endocarditis can damage or destroy your heart valves or trigger a stroke. If you are at high risk of endocarditis, it's recommended that you take antibiotics one hour before dental cleanings. Regular dental checkups are important. Healthy gums and teeth reduce the risk that bacteria will enter the bloodstream.
• Stroke. A congenital heart defect can allow a blood clot to pass through your heart and travel to your brain, where it reduces or blocks blood supply.
• Pulmonary hypertension. This is a type of high blood pressure that affects the arteries in your lungs. Some congenital heart defects send more blood to the lungs, causing pressure to build. This eventually causes your heart muscle to weaken and sometimes to fail.
• Heart failure. Heart failure (congestive heart failure) means your heart can't pump enough blood to meet your body's needs. Some types of congenital heart disease can lead to heart failure.

Adult congenital heart disease and pregnancy

Women with mild congenital heart disease can have a successful pregnancy. However, some women with complex congenital heart defects are advised against pregnancy.

If you're thinking about becoming pregnant, talk to you doctor about the possible risks and complications. Together you can discuss and plan for any special care you might need during pregnancy.