Tetralogy of Fallot

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Written by Chen Guang Yin
Cardiology
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Can someone with Tetralogy of Fallot have a second child?

Tetralogy of Fallot is a congenital cardiac defect that has not been found to have a definite genetic relationship, meaning no chromosomal abnormalities have been discovered. However, congenital heart disease does tend to occur within families to a certain extent, indicating some level of familial predisposition. The primary cause, however, is believed to be related to viral infections during the first three months of pregnancy or the use of certain medications. Therefore, we believe that parents of a child with Tetralogy of Fallot can consider having a second child.

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Written by Tong Peng
Pediatrics
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Can children with Tetralogy of Fallot heal on their own?

Children with Tetralogy of Fallot cannot be cured, as this condition is a congenital disease, primarily involving vascular malformations, characterized by ventricular septal defects, overriding aorta, pulmonary hypertension, and right ventricular hypertrophy. Due to pulmonary atresia or near-atresia, leading to numerous collateral vessels, it might only present with a ventricular septal defect with shunting or mild pulmonary valve stenosis. The effectiveness of surgery for this type of Tetralogy of Fallot may not be particularly good, and the chances of a cure are very low. Therefore, for this category, early detection and surgical treatment are crucial, and it is important to enhance dietary nutrition and care in daily life, as it is prone to pulmonary infections, which can lead to serious conditions such as respiratory failure and heart failure.

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Written by Yan Xin Liang
Pediatrics
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Tetralogy of Fallot is caused by what?

Tetralogy of Fallot is the most common cyanotic congenital heart disease in childhood, consisting of four abnormalities: ventricular septal defect, obstruction of the right ventricular outflow tract, overriding aorta, and hypertrophy of the right ventricle. Congenital heart disease generally stems from abnormal cardiovascular development during the fetal period, resulting in a complex vascular malformation. The occurrence of cardiovascular malformations is mainly due to the interaction of genetic and environmental factors. The causes of congenital heart disease have not been fully clarified yet, but it is important to reinforce prenatal care, especially by actively preventing viral infections early in pregnancy and avoiding certain high-risk factors related to the disease to prevent congenital heart disease in children.

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Written by Yao Li Qin
Pediatrics
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Tetralogy of Fallot surgery success rate

Tetralogy of Fallot is a common cyanotic congenital heart disease in children after the age of one. It consists of four abnormalities: ventricular septal defect, obstruction of the right ventricular outflow tract, overriding aorta, and right ventricular hypertrophy. Once Tetralogy of Fallot is diagnosed, the ultimate treatment is surgical. With the development of pediatric cardiothoracic surgery, there are no specific requirements regarding the birth month or weight of the child for the surgery, so the success rate of Tetralogy of Fallot surgery is now very high. If a child has Tetralogy of Fallot, it is crucial to seek active treatment and not to give up.

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Written by Chen Guang Yin
Cardiology
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Is it normal after the complete repair of Tetralogy of Fallot?

Tetralogy of Fallot is a serious congenital heart defect characterized by a ventricular septal defect, pulmonary stenosis, and problems with right ventricular obstruction. It is a congenital disease that can cause hypoxia throughout the body, especially as age increases, the symptoms tend to worsen. After the corrective surgery for Tetralogy of Fallot, it does not mean that the patient is completely normal. Their lifespan is still somewhat impacted. They will not be like patients with simpler congenital heart diseases such as only a ventricular septal defect or atrial septal defect, who can achieve a natural lifespan. For these individuals, their lifespan is still impacted to some extent. As they age post-surgery, some complications may arise, including sudden death, and some may require a second surgery.

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Written by Yan Xin Liang
Pediatrics
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The main cause of hypoxic attacks in Tetralogy of Fallot

Tetralogy of Fallot is a complex congenital heart disease, characterized by ventricular septal defect, right ventricular outflow tract obstruction, aorta overriding, and right ventricular hypertrophy. When the obstruction of the right ventricular outflow tract is severe, pulmonary artery blood flow significantly decreases. A large amount of unoxygenated venous blood passes through the ventricular septal defect causing a right-to-left shunt, which clinically manifests as severe cyanosis and increased red blood cells, and different degrees of hypoxia in the systemic circulation. Factors that can induce hypoxic episodes in these infants include feeding, crying, emotional agitation, anemia, infection, etc. These can suddenly lead to fainting, convulsions, or even death. The main reason is generally due to a sudden muscle spasm at the narrow pulmonary artery infundibulum on top of pre-existing stenosis, causing temporary pulmonary artery obstruction and exacerbating cerebral hypoxia, thus leading to severe hypoxic attacks.

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Written by Tong Peng
Pediatrics
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Does Tetralogy of Fallot easily lead to heart failure?

Tetralogy of Fallot often leads to symptoms of heart failure because it is a severe congenital disease. Affected children tend to present with cyanosis of the lips, impaired growth and development, and a simple echocardiography can reveal specific indicators such as aorta overriding, pulmonary stenosis, right ventricular hypertrophy, and ventricular septal defect. These children have limited lung and heart function, making them prone to increased cardiac load and symptoms of heart failure following infections or physical activity. Therefore, early surgical treatment is necessary for these children to prevent recurrent infectious diseases and heart failure, which can affect their normal growth and development. Additionally, it is crucial to enhance nutrition and exercise in their daily lives to boost their immune system. For Tetralogy of Fallot, early detection and treatment are essential.

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Written by Yan Xin Liang
Pediatrics
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Is tetralogy of Fallot a chromosomal problem?

Tetralogy of Fallot is the most common cyanotic congenital heart disease in childhood, consisting of four defects: ventricular septal defect, obstruction of the right ventricular outflow tract, overriding aorta, and right ventricular hypertrophy. It is a type of congenital heart disease, which generally stems from abnormal cardiovascular development during fetal life, resulting in cardiovascular malformations not controlled by chromosomes. The malformation of the cardiovascular system is mainly caused by genetic factors, environmental factors, and their interactions. The exact cause of this congenital heart disease has not been fully identified yet, indicating that it is not a chromosomal disease but a result of cardiovascular developmental abnormalities during fetal life.

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Written by Chen Guang Yin
Cardiology
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Can Tetralogy of Fallot receive oxygen therapy?

Tetralogy of Fallot is a congenital heart defect that includes abnormalities such as ventricular septal defects, pulmonary valve stenosis, and stenosis of the right ventricular outflow tract. Due to these congenital defects, the ejection of blood from the heart is affected, which in turn impacts the blood supply to various systems and organs throughout the body. The patient may exhibit symptoms of cyanosis and hypoxia, especially after physical activity, hence the use of supplemental oxygen is advisable. While oxygen therapy can temporarily alleviate these hypoxic symptoms, it does not address the underlying issue. Surgery is necessary for a definitive resolution.

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Written by Chen Guang Yin
Cardiology
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Does Tetralogy of Fallot involve chromosomal abnormalities?

Tetralogy of Fallot is primarily a developmental disorder, generally unrelated to chromosomes, with no chromosomal abnormalities. The cause of the disease is still not very clear. If pregnant again and giving birth again, it generally does not recur. Therefore, couples undergoing chromosomal testing before pregnancy is a common practice. It is generally believed that the four malformations in Tetralogy of Fallot occur due to viral infections acquired by the fetus during pregnancy, the mother consuming alcohol, or the use of certain medications during pregnancy. Currently, these are considered related factors, and so far, no abnormalities have been found related to genetics or chromosomes.