All About

ASD- Atrial Septal Defect


Many children have no symptoms and seem healthy. However, if the ASD is large, permitting a large amount of blood to pass through to the right side of the heart, the right atrium, right ventricle, and lungs will become overworked, and symptoms may be noted. The following are the most common symptoms of atrial septal defect. However, each child may experience symptoms differently. Symptoms may include:

Child tires easily when playing

Fatigue and sweating

Swelling of legs, feet or abdomen

Rapid breathing and shortness of breath

Heart murmur - a swooshing sound which can be heard using a stethoscope.

The symptoms of an atrial septal defect may resemble other medical conditions or heart problems. Always consult your child's physician for a diagnosis.


The heart is forming during the first 8 weeks of fetal development. It begins as a hollow tube, then partitions within the tube that eventually become the septa (or walls) dividing the right side of the heart from the left. Atrial septal defects occur when the partitioning process does not occur completely, leaving an opening in the atrial septum.

It is believed that some congenital heart defects may have a genetic link, either occurring due to a defect in a gene, a chromosome abnormality, or environmental exposure, causing heart problems to occur more often in certain families. However doctors are unsure and find that atrial septal defects occur sporadically (by chance), with no clear reason for their development

More about Treatment

ASD or Atrial Septal Defect


An atrial septal defect (ASD) is an opening or hole in the wall that separates the two upper chambers of the heart. This wall is called the atrial septum. The hole causes oxygen-rich blood to leak from the left side of the heart to the right side. This causes extra work for the right side of the heart, since more blood than necessary is flowing through the right ventricle.


ASD Diagnosis


Most atrial septal defects (ASD) are discovered during childhood when a murmur, an extra heart sound is heard during a physical examination.

To help diagnosis ASD in adulthood, your doctor also may suggest the following tests:

Electrocardiogram (EKG or ECG), which records the heart's electrical activity

Chest X-ray to see the heart's size

Echocardiogram, which is an ultrasound examination of the heart

In addition, your doctor may use a cardiac catheterization procedure to inject a dye into the heart and to see on a moving picture X-ray how the heart and aorta are functioning.


Risk Factors


t's not known why atrial septal defects occur, but congenital heart defects appear to run in families and sometimes occur with other genetic problems, such as Down syndrome. If you have a heart defect, or you have a child with a heart defect, a genetic counsellor can estimate the odds that any future children will have one.

Some conditions that you have or that occur during pregnancy may increase your risk of having a baby with a heart defect, including:

Rubella infection - Becoming infected with rubella (German measles) during the first few months of your pregnancy can increase the risk of foetal heart defects.

Drug, tobacco or alcohol use, or exposure to certain substances - Use of certain medications, tobacco, alcohol or drugs, such as cocaine, during pregnancy can harm the developing foetus.

Diabetes or lupus. If you have diabetes or lupus, you may be more likely to have a baby with a heart defect.

Obesity - Being extremely overweight (obese) may play a role in increasing the risk of having a baby with a birth defect.

Phenylketonuria (PKU) - If you have PKU and aren't following your PKU meal plan, you may be more likely to have a baby with a heart defect.


ASD Complications


A small atrial septal defect usually does not cause any problems. Small atrial septal defects often close during infancy.

Larger defects can cause serious problems, including:

Right-sided heart failure

Heart rhythm abnormalities (arrhythmias)

Increased risk of a stroke

Shortened life span

Less common serious complications may include:

Pulmonary hypertension - If a large atrial septal defect goes untreated, blood flow to your lungs increases thereby raising the blood pressure in the lung arteries (pulmonary hypertension).

Eisenmenger syndrome - Pulmonary hypertension can cause permanent lung damage. This complication, called Eisenmenger syndrome, usually develops over many years and occurs uncommonly in people with large atrial septal defects.

Treatment can prevent or help manage many of these complications.


ASD Prevention


Atrial septal defects can't be fully prevented. But few precautions can be taken by regular visit to your doctor and:

Rubella testing and getting vaccination

Review health conditions and medications.

Reviewing family medical history and genetic predisposition


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