Risk factors
By Mayo Clinic staffVentricular septal defect appears to run in families and sometimes occurs with other genetic problems, such as Down syndrome. If you already have a child with a heart defect, a genetic counselor can predict the approximate odds that your next child will have one.
Having the following conditions during pregnancy can increase your risk of having a baby with a heart defect.
- Rubella infection. Becoming infected with German measles (rubella) while pregnant can increase the risk of fetal heart defects. The rubella virus crosses the placenta and spreads through the fetus' circulatory system damaging blood vessels and organs, including the heart.
- Poorly controlled diabetes. Uncontrolled diabetes in the mother in turn affects the fetus' blood sugar, causing damaging effects to the developing fetus.
- Drug or alcohol use or exposure to certain substances. Use of certain medications, alcohol or drugs or exposure to chemicals or radiation during pregnancy can harm the developing fetus.
- Holes in the heart. National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/dci/Diseases/holes/holes_all.html. Accessed Aug. 2, 2011.
- More information for parents of children with VSD. American Heart Association. http://www.heart.org/HEARTORG/Conditions/CongenitalHeartDefects/AboutCongenitalHeartDefects/Ventricular-Septal-Defect-VSD_UCM_307041_Article.jsp. Accessed Aug. 3, 2011.
- More information for adults with VSD. American Heart Association. http://www.heart.org/HEARTORG/Conditions/CongenitalHeartDefects/AboutCongenitalHeartDefects/Ventricular-Septal-Defect-VSD_UCM_307041_Article.jsp. Accessed Aug. 3, 2011.
- Dummer KB, et al. Pathophysiology and clinical features of isolated ventricular septal defects in infants and children. http://www.uptodate.com/home/index.html. Accessed Aug. 2, 2011.
- Cohen S, et al. Ventricular septal defect. In: Ferri FF. Ferri's Clinical Advisor 2012. Philadelphia, Pa.: Mosby Elsevier; 2011. http://www.mdconsult.com/books/page.do?eid=4-u1.0-B978-0-323-05611-3..C2009-0-38601-8&isbn=978-0-323-05611-3&uniqId=270492172-3#4-u1.0-B978-0-323-05611-3..C2009-0-38601-8--TOP. Accessed Aug. 2, 2011.
- Dummer KB, et al. Management of isolated ventricular septal defects in infants and children. http://www.uptodate.com/home/index.html. Accessed Aug. 2, 2011.
- Nishimura RA. ACC/AHA guideline update on valvular heart disease: Focused update on infective endocarditis. Circulation. 2008;118:887.
- Genetic counseling. American Heart Association. http://www.heart.org/HEARTORG/Conditions/CongenitalHeartDefects/UnderstandYourRiskforCongenitalHeartDefects/Genetic-Counseling_UCM_307393_Article.jsp. Accessed Aug. 3, 2011.
- Ammash NM, et al. Ventricular septal defect in adults. http://www.uptodate.com/home/index.html. Accessed Aug. 2, 2011.
- Cetta F (expert opinion). Mayo Clinic, Rochester, Minn. Sept. 19, 2011.


Find Mayo Clinic on