The National Institute for Health and Clinical Excellence (NICE) has issued full guidance to the NHS in England, Wales, Scotland and Northern Ireland on radiofrequency valvotomy for pulmonary atresia.
Radiofrequency valvotomy is used to treat pulmonary atresia, a congenital malformation of the pulmonary valve in which the valve orifice fails to develop. The valve is completely closed thereby obstructing the outflow of blood from the heart to the lungs. Babies with this type of cyanotic congenital heart disease survive only for the first few days of life while the normal fetal shunts between left and right circulations remain patent. Without an operation in that period to open the pulmonary valve or to make a shunt between the aorta and the pulmonary arteries, the condition is fatal.
The standard treatment for pulmonary atresia is open heart surgery which includes the Fontan procedure (the surgical creation of a right ventricular bypass by directly connecting either the right atrium or the superior or inferior vena cava and the pulmonary artery) and the Blalock-Taussig shunt (a palliative procedure where a shunt is created to allow blood to pass from the aorta to the pulmonary artery by dividing the left subclavian artery and connecting it to the left pulmonary artery). Further open heart surgery may include open surgical valvotomy.
Radiofrequency valvotomy is a minimally invasive cardiac catheterisation procedure which involves creating an opening in the blocked pulmonary valve followed by dilation using balloon angioplasty. It avoids open surgery but some children will later need a permanent shunt procedure.