Tetralogy of Fallot surgery success rate

Written by Yao Li Qin

Pediatrics

Updated on March 29, 2025

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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 Hu Qi Feng

Pediatrics

39sec

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Tetralogy of Fallot Emergency Measures

Generally, one should often drink water to prevent infection, prevent dehydration and complications. Infants and young children should be especially careful in their care, to avoid episodes of paroxysmal hypoxia. In mild cases of hypoxic episodes, placing them in a knee-chest position can alleviate the symptoms. In severe cases, oxygen should be administered immediately, along with the appropriate drug treatment. If the episodes cannot be effectively controlled with medication, emergency surgical intervention may be necessary. With the continuous improvement in surgical techniques this year, the mortality rate for curative surgeries has been decreasing.

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Written by Chen Guang Yin

Cardiology

50sec

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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 Chen Guang Yin

Cardiology

44sec

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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 Hu Qi Feng

Pediatrics

1min 12sec

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Tetralogy of Fallot Common Symptoms

The clinical manifestations of Tetralogy of Fallot include, firstly, cyanosis as the primary clinical symptom. The degree and onset of cyanosis are related to the severity of pulmonary stenosis, and it often appears in areas with abundant capillaries such as lips, fingers, toes, nail beds, and bulbar conjunctiva. Secondly, squatting symptoms are common among children; they often spontaneously squat for a while during walking or playing. Squatting, with the legs bent, reduces the venous return and thus decreases the load on the heart, temporarily relieving symptoms of hypoxia by reducing the right-to-left shunt. Thirdly, clubbing occurs due to long-term hypoxic conditions, which can cause capillary dilation and proliferation in the fingers and toes, and the local soft tissues and bones also grow and enlarge; fourthly, paroxysmal hypoxic attacks, which are most common in infants, can be triggered by breastfeeding, crying, emotional excitement, or anemia. These attacks suddenly occur and can lead to severe symptoms including difficulty breathing, fainting, convulsions, and even death.

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Written by Hu Qi Feng

Pediatrics

41sec

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Tetralogy of Fallot seizure causes

The cause of seizures in Tetralogy of Fallot is episodic hypoxia leading to cerebral hypoxia, which causes seizures, commonly seen in infants. These seizures can be triggered by feeding, crying, emotional excitement, anemia, or infections, manifesting as episodic breathing difficulties. In severe cases, sudden fainting, convulsions, or even death may occur. The underlying cause is the narrowing of the pulmonary artery infundibulum and sudden muscle spasms, which lead to temporary pulmonary artery obstruction, worsening cerebral hypoxia.