Causes of infant room septal defect

Written by Li Hai Wen

Cardiology

Updated on September 09, 2024

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Atrial septal defect is a relatively common congenital heart disease in infants and young children. The causes of atrial septal defects are not very clear, but modern medicine considers that it may be related to the mother having a cold during pregnancy or taking certain medications, or to certain physical and chemical factors during pregnancy. Generally, atrial septal defects are not inherited and are not largely related to genetics.

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Written by Tang Li

Cardiology

1min 26sec

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How does septal defect shunt?

Atrial septal defect is the most common congenital heart disease in adults, accounting for 20%-30% of all adult congenital heart conditions. The impact of an atrial septal defect on hemodynamics primarily depends on the amount of shunting. Due to higher pressure in the left atrium compared to the right atrium, a left-to-right shunt is formed. The amount of shunting depends on the size of the defect, as well as the compliance of the left and right ventricles and the relative resistance in the systemic and pulmonary circulations. Diseases that affect the compliance of the left ventricle, such as hypertension and coronary artery disease, can increase the extent of the left-to-right shunt. A continuous increase in pulmonary blood flow leads to pulmonary congestion, increasing the load on the right heart. Pulmonary vascular compliance decreases, progressing from functional pulmonary arterial hypertension to organic pulmonary arterial hypertension. As right heart system pressure continuously increases and eventually exceeds the pressure in the left heart system, the original left-to-right shunt reverses to become a right-to-left shunt, resulting in cyanosis.

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Written by Li Hai Wen

Cardiology

39sec

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Postoperative precautions for atrial septal defect surgery

Ventricular septal defect surgery is often divided into surgical operations and interventional treatments by the Department of Internal Medicine. For interventional treatments, it is important to rest in bed for 24 hours afterwards. Also, the site of the puncture needs to be immobilized for at least eight hours, so it is important to regularly check the heart with an echocardiogram after the surgery. After surgical operations, it is important to maintain a balanced diet with easily digestible foods. Within a month after surgery, try to avoid strenuous activities, and regularly check the heart with an echocardiogram under the guidance of a doctor.

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Written by Zhang Zhi Gong

Cardiothoracic Surgery

1min 12sec

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The difference between ventricular septal defect and atrial septal defect

The difference between a ventricular septal defect and an atrial septal defect mainly lies in their locations. A normal heart is divided into four chambers, which are the left ventricle, right ventricle, left atrium, and right atrium. Each chamber is separated by a septum, much like walls between rooms in a house. Due to certain reasons, such as congenital heart defects, there may be openings or defects in these walls, known as septal defects. An atrial septal defect refers to a defect between the right atrium and the left atrium, whereas a ventricular septal defect pertains to a defect between the left and right ventricles. The murmur of atrial septal defects is relatively softer, as the pressure difference between the atria is smaller, and the defect is located higher up. In contrast, the murmur of ventricular septal defects is louder due to the greater pressure difference between the ventricles and is located lower down, approximately between the third and fourth ribs. The murmur of atrial septal defects is found between the second and third ribs. Moreover, since the pressure difference in ventricular septal defects is greater, the impact on the heart is relatively more significant.

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Written by Li Hai Wen

Cardiology

38sec

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Can someone with an atrial septal defect go swimming?

Atrial septal defect is not uncommon in our daily lives. Many patients with atrial septal defects often ask their doctor if they can swim. This has to be analyzed based on specific circumstances. If the atrial septal defect is not severe, and it's just a minor atrial septal defect, generally it does not affect the patient's daily activities, such as swimming or running. However, if the atrial septal defect is severe, especially if it has led to heart failure and heart enlargement, in this situation, one should definitely not engage in strenuous activities such as swimming or running.

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Written by Xie Zhi Hong

Cardiology

1min 5sec

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Does a ventricular septal defect make it easier to catch a cold?

Mild atrial septal defects generally permit a normal life and do not easily cause colds. However, when pulmonary hypertension and heart failure occur with an atrial septal defect, it can lead to pulmonary congestion. At this point, bacterial colonization occurs, making respiratory infections more likely to develop. However, the colds we often refer to are upper respiratory tract infections, and atrial septal defects generally do not cause a decrease in immune system function. However, if the upper respiratory tract infection is not treated promptly, it can lead to bronchitis, lung infections, etc., often exacerbating heart failure associated with the atrial septal defect. Therefore, while an atrial septal defect does not cause colds, patients with an atrial septal defect should address colds early to prevent the onset of heart failure triggered by the cold.