An atrial septal defect is an opening in the atrial septum, or dividing wall between the two upper chambers of the heart, known as the right and left atria. Learn more about this condition.
Our heart team performs hundreds of cardiac catheterization procedures a year, treating patients of all ages, including those with complex heart conditions.
Our pediatric heart surgery team performs twice the number of surgeries of any other hospital in the region, with some of the best outcomes in the nation.
The pediatric heart experts at Children’s National Hospital in Washington, D.C., provide advanced care for unborn babies, children and young adults with heart conditions.