What Is Aortic Stenosis in Children? Aortic stenosis is difficulty in the flow of blood from the left ventricle of the heart to the body because of narrowing. In children, it is most often seen at the level of the aortic valve and is mostly congenital. In a normal heart, the aortic valve opens and allows oxygen-rich blood to pass into the aorta. When the aortic valve is narrow, the left ventricle has to generate higher pressure to send blood to the body. Over time, this can cause thickening of the heart muscle and, in advanced cases, impaired heart function. Narrowings other than at the aortic valve, below or above the valve, can also obstruct blood flow in a similar way. However, the treatment methods for these diseases may differ. Why Does Aortic Stenosis Occur in Children? Aortic valve stenosis in children usually arises during heart development in the womb. One of the most common causes is the aortic valve developing with two leaflets when it should normally have three. This is called a bicuspid aortic valve. In some children, the valve leaflets may be thick, stiff, or fused together. More rarely, structural narrowings that develop below or above the aortic valve can also obstruct the blood flow leaving the heart. What Are the Symptoms of Aortic Stenosis in Children? Symptoms vary according to the degree of narrowing and the child's age. Children with mild aortic stenosis may have no complaints. In moderate and advanced narrowings, the following symptoms may appear: - Tiring quickly and weakness - Shortness of breath during exercise - Chest pain - Dizziness or fainting - Palpitations - Feeding difficulty in infants - Inadequate weight gain - Signs of heart failure in severe cases Fainting or chest pain during exercise in particular may require urgent cardiological evaluation. Critical Aortic Stenosis in Newborns In some babies, the aortic valve may be severely narrowed from birth. In newborns with critical aortic stenosis, it may become difficult for the heart to pump enough blood to the body. These babies may develop rapid breathing, inability to feed, paleness, weak pulse, cold extremities, and serious circulatory failure. In particular, the baby's condition can deteriorate rapidly when the vascular connection called the ductus arteriosus closes. Critical aortic stenosis is a serious heart disease that may require emergency treatment in the newborn period. How Is Aortic Stenosis Diagnosed in Children? Aortic stenosis is diagnosed through physical examination and imaging methods performed by a pediatric cardiology specialist. 1. Physical Examination A heart murmur heard in the heart may be one of the first signs of aortic stenosis. 2. Echocardiography (ECHO) This is the basic diagnostic method that evaluates the structure of the aortic valve, the degree of narrowing, the blood flow velocity, and the function of the left ventricle. 3. Electrocardiography (ECG) Heart rhythm and findings related to the pressure load on the left ventricle can be examined. 4. Cardiac MRI or CT In some patients, it may be used to evaluate in detail the structure of the aorta and accompanying anomalies. 5. Cardiac Catheterization When necessary, it may be used to measure pressures inside the heart and to perform interventional treatment in the same session. In Which Situations Does Aortic Stenosis in Children Require Treatment? Surgery or interventional treatment is not necessary in every aortic stenosis. Children with mild stenosis and normal heart function are generally followed with regular cardiology check-ups. However, intervention may be needed in the following situations: - Advanced aortic stenosis - Chest pain or fainting during exercise - Deterioration of left ventricular function - Marked pressure load on the heart - Progression of the narrowing during follow-up - Serious circulatory failure in a newborn The treatment decision is made not only according to symptoms but also according to echocardiography findings and the overall condition of the heart. What Are the Treatment Methods for Aortic Stenosis in Children? The main aim of treatment is to ease blood flow from the heart to the body and to reduce the pressure load on the left ventricle. The method to be used is determined according to the location of the narrowing, the anatomical features of the valve, the child's age, and general health. 1. Balloon Aortic Valvuloplasty Balloon aortic valvuloplasty is one of the interventional treatment methods used in children with suitable aortic valve stenosis. In this procedure, the narrowed aortic valve is reached with the help of a catheter advanced through a groin vessel. The valve opening is widened by inflating the special balloon at the tip of the catheter. In this way, the aim is to ease the passage of blood into the aorta. Balloon valvuloplasty does not require open-heart surgery. However, valve leakage may develop after the procedure, or re-narrowing may occur over time. 2. Surgical Aortic Valve Repair In some children, the structure of the aortic valve may not be suitable for balloon dilation, or balloon treatment may not provide sufficient results. In these cases, surgical valve repair may be performed. During the operation, the valve leaflets may be separated from each other, thickened tissues may be adjusted, or the valve may be made to open better. The aim is to preserve the child's natural valve as far as possible. 3. Aortic Valve Replacement Valve replacement may be needed when the aortic valve is severely damaged and repair is not possible. In children, valve replacement must be planned carefully because of the growth process. Mechanical or biological valve options have different advantages and limitations. Long-term blood thinner treatment may be needed, particularly in patients with a mechanical valve. 4. Ross Operation The Ross operation is a special surgical method that can be performed in selected pediatric patients. In this procedure, the patient's own pulmonary valve is moved to the place of the aortic valve. A suitable valved conduit is placed in the pulmonary valve area. One of the advantages of this method is that the living valve moved to the aortic position has the potential to grow with the child. However, the Ross operation is a complex procedure, and reintervention may be needed in both valve areas in later years. 5. Surgical Treatment of Narrowings Below and Above the Aortic Valve In some children, the narrowing is not directly at the aortic valve but below or above the valve. In these cases, treatment may be planned as removal of the tissue causing the narrowing or surgical widening of the relevant region. For this reason, accurate anatomical diagnosis is of great importance in determining the appropriate treatment method. Is Aortic Stenosis Surgery in Children Risky? Aortic stenosis operations are performed by experienced pediatric heart surgery teams. Surgical risks vary according to the child's age, weight, valve structure, heart function, and the scope of the procedure to be performed. Possible complications include: - Bleeding and infection - Heart rhythm disorders - Valve leakage or re-narrowing - Deterioration in heart function - The need for reintervention in later years The expected benefits and possible risks should be discussed in detail with the family before treatment. Recovery Process After Aortic Stenosis Treatment The recovery time varies according to the treatment method used. After balloon valvuloplasty, the length of hospital stay is generally shorter than after open-heart surgery. After surgical treatment, children are followed in the intensive care unit and the ward. During this process: - Heart function is evaluated. - Blood flow across the aortic valve is checked. - Valve leakage or re-narrowing is investigated. - Heart rhythm is monitored. - Necessary medication treatments are arranged. - Nutrition and physical development are monitored. Can Children Live Normally After Aortic Stenosis Treatment? After successful treatment, many children can show normal growth and development. Children can continue their school life and take part in physical activities in line with the cardiology specialist's recommendations. However, aortic valve stenosis may require regular follow-up even after treatment. In some patients, valve stenosis or regurgitation may develop in later years. In particular, the need for reintervention may arise during the growth process. For this reason, long-term pediatric cardiology check-ups are important. Why Is Early Diagnosis Important? When aortic stenosis is detected early, the pressure load on the heart and the progression of the narrowing can be evaluated regularly. Intervention performed at the right time when needed can reduce the risk of permanent damage to the heart muscle. In newborns with critical aortic stenosis in particular, early diagnosis and emergency treatment can be life-saving. Remember: Aortic stenosis in children does not always require open-heart surgery. While mild cases are followed regularly, balloon dilation or surgical treatment may be applied in serious narrowings. Early diagnosis, the right choice of treatment, and long-term cardiological follow-up are of great importance in protecting children's heart health.