Tetralogy of Fallot is a congenital heart defect that affects the structure of the heart and causes a disruption in blood flow. It is one of the most common forms of cyanotic congenital heart disease, meaning it can result in a decreased supply of oxygenated blood to the body.
Tetralogy of Fallot involves four main abnormalities within the heart:
1. Ventricular septal defect (VSD): This is a hole in the wall (septum) between the two lower chambers of the heart (ventricles). It allows oxygenated and deoxygenated blood to mix.
2. Pulmonary stenosis: In this condition, there is narrowing or obstruction in the pulmonary valve or the blood vessels leading to the lungs. This restricts blood flow to the lungs for oxygenation.
3. Right ventricular hypertrophy: The right ventricle, responsible for pumping blood to the lungs, becomes thicker and more muscular due to the increased workload caused by the pulmonary stenosis.
4. Overriding aorta: The aorta, the main artery that carries oxygenated blood from the heart to the body, is positioned above the VSD instead of arising from the left ventricle. This allows oxygen-poor blood to mix with oxygen-rich blood and be pumped to the body.
The combination of these abnormalities results in reduced blood flow to the lungs and inadequate oxygenation of blood, leading to cyanosis (a bluish discoloration of the skin and mucous membranes).
Symptoms of Tetralogy of Fallot can vary depending on the severity of the condition. They may include cyanosis (bluish skin), shortness of breath, rapid breathing, difficulty feeding, poor growth, and clubbing of the fingers and toes.
Treatment for Tetralogy of Fallot typically involves surgical intervention to correct the defects. The most common procedure is called a “complete repair,” which involves closing the VSD and widening the pulmonary valve and blood vessels to improve blood flow to the lungs. In some cases, a temporary procedure called a “palliative shunt” may be performed in infants to improve blood flow and prepare them for a complete repair at a later stage.
Regular follow-up care is essential to monitor the heart’s function and ensure optimal long-term outcomes. With early diagnosis and appropriate medical and surgical management, individuals with Tetralogy of Fallot can lead active and fulfilling lives. It is important to consult with a healthcare professional for a thorough evaluation and personalized treatment plan.