If you have any concerns about this, you can ask your GP to refer your child to a Cardiologist for investigations. However, it is very unlikely that anything worrying will be found if your child has not had any complications up to now. Many children have not had any problems at all and some will have needed heart surgery. This is a very stressful and worrying time for the parent and you will probably find that to talk to other parents who have had the same experiences, is a tremendous help. There are local support groups in most areas which are affiliated to the British Heart Foundation or you can contact the 22q11 Group who also have personal experience of children and heart surgery.
Some children have a complete or partial absence of the thymus gland.
This can prevent the proper development of the immune system. Some children may not be affected at all, whilst other are more severely affected. Often children will be slightly more susceptible to colds and infections and take longer than usual to shake them off. Children who have severe problems with their immune systems should consult their paediatrician or immunologist before receiving vaccinations. Some children have low levels of calcium resulting from incorrect functioning of the parathyroid gland.