Click the above image to view our clinic locations across the DC metropolitan area.
Click the above image to learn how the heart works in easy to understand terms and picture diagrams.
Click the above image to view our online coloring book and have fun while learning about the heart!
By Plimun Web Design
Welcome to the Children’s Heart Institute’s web site. Our main goal is to provide useful and reliable educational information to parents, patients, nurses, and health care professionals. Simplifying science and patient education is my passion, and I consider it an integral element of patient care. Parents need to be well informed to understand their child’s condition, as this will alleviate anxieties and enable parents to be more comfortable with their child’s care options.
Simplifying science is always a challenge, as some cardiac conditions are pretty complex. Therefore, it is very important that you use this information in conjunction with input from your health care provider and pediatric cardiologist. For example, when we explain a condition, we provide an explanation for a typical case. However, certain additional abnormalities within any cardiac condition can affect the blood flow in a way that makes it very different from the typical case. This is very relevant in patients who have hypoplastic left heart syndrome that presents with different varieties and requires different treatment pathways.
In this site you will find extensive information on medications that should be considered in conjunction with your health care providers. Doctors and nurses who use this site for information on medications and their usage should check the latest updates related drug indications and interactions.
The Children’s Heart Institute’s (CHI) message is to provide state of the art pediatric cardiology care. CHI has currently fourteen different facilities in Maryland and Virginia that are close to where people live to minimize travel time and enhance accessibility to care.
CHI cardiologists are very specialized in areas of pediatric electrophysiology, interventional cardiac procedures, Dysautonomia, and fetal cardiology. Our entire team of cardiologists, nurses, and exercise physiologists are very dedicated to patient education and consider it as one of the very important aspects of patient care. Please feel free to call or contact us if you have any questions.
Always keep hope and perseverance as you go forward with your child’s treatment. Over the last 20 years, pediatric cardiac care, intervention, and surgery have made great leaps in treating patients with complex and severe cardiac conditions. The future also holds great promises and hopes with more knowledge and progress in fetal intervention, molecular genetics, and tissue engineering.
Best wishes and warmest regards,

Hasan Abdallah, MD, FAAP, FACC, FSCAI
Medical Director
Children’s Heart Institute
If you would like to access our previous web site, please click here.
The Children's Heart Institute is a pediatric cardiology facility that provides comprehensive diagnostic and therapeutic services for children with or are suspected of having heart disease. At the Children's Heart Institute, we take a family approach to medical care. In addition to the attending pediatric cardiologist, the practice also utilizes the expert medical services of pediatric sub-specialists for non-cardiac problems.
The institute provides services for the unborn, children, and young adults up to 21 years of age. Adults with Congenital Heart Disease are treated in conjunction with their adult cardiologists and referring physicians.
We at CHI aim to ensure that all of our patients understand their condition. Our web site offers a wealth of information about various medical issues that we treat in addition to offering general information about how the heart works. Feel free to browse around, using the following links as a starting point, to learn more about your heart and your condition.
Common Problems
The Heart House - How the Heart Works

Children's Heart Institute - Leesburg
19465 Deerfield Avenue, Suite 310
Leesburg, VA 20176
Phone: 571-291-9025
Fax: 703-724-4408

