Does a ventricular septal defect affect development?

Written by Zhang Zhi Gong
Cardiothoracic Surgery
Updated on September 03, 2024
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Does a ventricular septal defect affect development? For relatively small ventricular septal defects, such as those under five millimeters, the shunt from the left ventricle to the right ventricle is minimal, hence patients may not exhibit noticeable symptoms. However, if the defect is larger, for instance, over five millimeters, a large volume of blood will flow from the left ventricle into the right ventricular system. This causes congestion in the right ventricular system and the pulmonary circulation will be flooded with blood. As the saying goes, "flowing water does not rot, nor do door hinges become worm-eaten"; however, when a large amount of blood accumulates in the pulmonary vessels, patients are prone to recurrent respiratory infections and even congestive right heart failure, which then leads to feeding difficulties. Patients feel consistently uncomfortable and have difficulty breathing, so they may be reluctant to eat, especially in young children who need considerable effort to drink milk, which requires some breath-holding. At this time, patients experience feeding difficulties, which equates to developmental delays. Therefore, larger ventricular septal defects can affect a child's development. Small defects, such as those under three millimeters, might not affect development, but larger defects do impact development and thus require timely treatment.

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Written by Zhang Zhi Gong
Cardiothoracic Surgery
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Ventricular septal defect refers to a defect in the ventricular septum, the wall dividing the left and right ventricles of the heart.

A normal human heart is divided into four chambers: the left ventricle, right ventricle, left atrium, and right atrium. The circulation in a normal person involves venous blood entering the right atrium, passing through the mitral valve into the right ventricle. The right ventricle then contracts and pumps blood into the lungs. After exchanging gases and becoming oxygenated, the blood turns bright red. It then returns to the left atrium. From the left atrium, blood passes through the mitral valve back into the left ventricle, and then the left ventricle contracts and pumps blood throughout the body. Therefore, there is a thick wall between the normal left and right ventricles, known as the ventricular septum. If due to congenital heart disease or other reasons, a small hole appears in the ventricular septum, it is called a ventricular septal defect. If this defect is large, it necessitates active surgical treatment because if the defect exists, the pressure of the blood flow in the left ventricle is higher, causing a large amount of abnormal blood to enter the right ventricle. This leads to a significant accumulation of blood in the right ventricle, causing the patient to have too much blood in the pulmonary circulation, making the patient prone to recurrent colds and infections. Furthermore, these children may easily develop heart failure and even life-threatening conditions such as infective endocarditis.

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Written by Zhang Zhi Gong
Cardiothoracic Surgery
1min 24sec home-news-image

Does a ventricular septal defect affect development?

Does a ventricular septal defect affect development? For relatively small ventricular septal defects, such as those under five millimeters, the shunt from the left ventricle to the right ventricle is minimal, hence patients may not exhibit noticeable symptoms. However, if the defect is larger, for instance, over five millimeters, a large volume of blood will flow from the left ventricle into the right ventricular system. This causes congestion in the right ventricular system and the pulmonary circulation will be flooded with blood. As the saying goes, "flowing water does not rot, nor do door hinges become worm-eaten"; however, when a large amount of blood accumulates in the pulmonary vessels, patients are prone to recurrent respiratory infections and even congestive right heart failure, which then leads to feeding difficulties. Patients feel consistently uncomfortable and have difficulty breathing, so they may be reluctant to eat, especially in young children who need considerable effort to drink milk, which requires some breath-holding. At this time, patients experience feeding difficulties, which equates to developmental delays. Therefore, larger ventricular septal defects can affect a child's development. Small defects, such as those under three millimeters, might not affect development, but larger defects do impact development and thus require timely treatment.

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Written by Zhang Zhi Gong
Cardiothoracic Surgery
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Interventricular septal defect X-ray manifestation

X-ray Manifestations of Ventricular Septal Defect. These are mainly related to the size of the defect. If the ventricular septal defect is relatively small, for example less than three millimeters, the amount of blood shunted from the left ventricle to the right ventricular system is minimal. Consequently, right ventricular congestion is not pronounced, making pulmonary congestion also less obvious. At this point, the X-ray may show no significant changes. However, if the defect is larger, greater than three millimeters, for instance five millimeters, a large volume of high-pressure blood from the left ventricle will flow excessively through the defect into the right ventricular system. This leads to significant congestion in the right ventricle and, thus, in the entire pulmonary circulation. Additionally, the X-ray will show a prominent pulmonary artery segment and increased pulmonary blood flow. Moreover, over time, this condition may lead to compensatory enlargement of the left ventricular system. On the X-ray, enlargement of both the right and left ventricles can be observed. Furthermore, due to sustained high pressure, the distal pulmonary arteries may show signs of severe pulmonary vascular disease on the X-ray, resembling a broken book. This indicates that the pulmonary circulation has reached an end-stage condition.

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Written by Di Zhi Yong
Cardiology
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If a ventricular septal defect is not surgically repaired, what will happen?

If the patient has a history of congenital heart disease, especially ventricular septal defect, it can lead to symptoms such as palpitations and chest tightness. The current recommendation for treatment is primarily symptomatic management; however, it is also advised that patients seek early surgical intervention at a hospital. Medical treatment or drug therapy often does not yield ideal results for this condition, and surgical intervention is necessary to address these symptoms. Currently, minimally invasive surgical treatment can be used. If the patient does not undergo surgery, conditions such as palpitations, chest tightness, and difficulty breathing can occur at any time.

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Written by Di Zhi Yong
Cardiology
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Causes of hoarseness due to ventricular septal defect.

If a patient exhibits some ventricular septal defects, it is possible for hoarseness to occur, as this condition is a type of congenital heart disease. If a patient frequently experiences hoarseness, it might be caused by congenital heart disease, but chronic pharyngitis or laryngitis, which can also cause hoarseness, should not be ruled out. Additionally, conditions like vocal cord polyps or deeper diseases can lead to hoarseness. However, it is important to differentiate these from normal diseases. If the issue is solely a ventricular septal defect, surgical treatment can be recommended for the patient, which can achieve a complete cure. Attention should also be paid to maintaining a healthy diet.