Signs & Symptoms
The appearance of children with Down Syndrome is often characteristic - they are often rather small with a round face and a slight upward slant to their eyes. They may have medical problems for example reduced learning capacity, muscle tone, feeding, gland and intestinal dysfunction, breathing problems and heart defects.
Half of all children with Down syndrome have a heart problem. These include patent ductus arteriosus, atrial septal defect, ventricular septal defect, tetralogy of Fallot and atrioventricular septal defects.
What causes it
Down Syndrome is due to an extra chromosome (number 21). Half of all children with Down syndrome have a heart problem. These include patent ductus arteriosus, atrial septal defect, ventricular septal defect, tetralogy of Fallot and atrioventricular septal defects.
About the condition
When a person has a syndrome they have similar characteristics to others with the same syndrome. This may include their appearance and medical problems. Syndromes are variable and it is unusual for someone to have all the characteristics - they may therefore be only slightly affected.
Down described this syndrome in 1866. It affects about 1 person in every 1,000. It is due to an extra chromosome (number 21).
Diagnosis and Treatment Options
Some of these heart conditions that children with Down Syndrome suffer from may not require surgery as some may close by themselves (patent ductus arteriosus, atrial septal defect, ventricular septal defect).
Tetralogy of Fallot and atrioventricular septal defects always require surgery and sometimes more than one operation is necessary.
Children and adults with congenital heart disease are at an increased risk of having a heart infection. Whilst this is rare the chances of it occurring can be reduced by taking precautions.
Infections in the heart can occur for no apparent reason but are more common if the teeth are rotten - germs spread into the blood stream and infect the heart. Good dental hygiene is therefore important as are regular visits to the dentist.
If dental treatment is required then some procedures can cause germs to spill into the blood and infect the heart.
It is therefore important that the dentist is informed about the heart condition before treatment. The usual method of avoiding this problem is to give a single dose of antibiotics one hour prior to the treatment to kill any germs beforehand.
Exercise is important even in those with heart disease. It improves the heart function and general sense of well being. It is associated with increased life expectancy and a reduced risk of heart disease in later life. In addition physical activity helps with controlling weight and reducing blood pressure.
There are different types of exercise. In static exercise the muscles contract but there is little joint movement eg weight lifting. In dynamic exercise the muscles contract and also move the joints eg running. Each places a different stress on the body and cardiovascular system. In general most types of sports are a mix of the two.
Children usually take part in more rigorous exercise at school as they grow older. In Singapore physical education (PE) tends to teach games skills rather than competitive sports. However pupils may take sport for their co-curricular activities (CCA) when training is more intense and competitive. Training for the NAPFA test is also intensive and some pupils with heart problems may have difficulty with the 2.4k run as they often perform less well at endurance type activities.
As always parents or patients must seek the advice of their own doctor when deciding how much exercise and to what level is safe - particularly as there are no published guidelines for activity levels in children
The Bottom Line
- Most children with heart conditions (even following surgery) can safely participate in sport at all levels
- Some children with complex heart problems should restrict themselves to certain sports only
- For a few children competitive sport should not be undertaken
- For all a certain level of fitness is healthy and should be encouraged
Most children with heart disease can have all the normal vaccinations at the appropriate time.
However some children with an immune deficiency (DiGeorge syndrome or an isomerism) and those who are receiving immunosuppression - for example following transplantation require a different vaccination schedule.
Before travelling anywhere unusual or a long distance make sure that you:
- have a recent medical check up
- have appropriate insurance cover
- have an adequate supply of medicine
- are aware of the quality and access to local health care
- carry the relevant documentation about the heart condition
Those with cyanotic heart disease ("blue" due to reduced oxygen in the blood) can still travel but aircraft at altitude have less oxygen in the air than at ground level and so the blueness may be more apparent. This does not usually cause symptoms but if necessary airlines can arrange for additional oxygen to be available on the aircraft.
For long aircraft flights it is sensible to use the support stockings and take aspirin or an equivalent unless your doctor advises against it.
Special diets are not normally necessary for those with heart disease. As with everyone it is important to have a balanced diet and not to eat to excess. It is however important to maintain a normal weight - excess weight means more work for the heart.
Most children with heart disease are no more prone to infections than any other children. Some however are likely to get chest infections - particularly those with holes in the heart (ASD, VSD, PDA).
In addition some heart diseases are also associated with an immune deficiency and infections therefore are more common. The majority of childhood infections are viruses and get better without antibiotics. In any case of doubt professional medical help should be sort and the doctor will decide if antibiotics are necessary.
Most children with heart disease do not require medication. Some however need them to:
- reduce the body fluids
- assist the pumping action
- control rhythm problems
- thin the blood
The majority of these medicine have been used for many years and are very safe but like all drugs side effects may occur - especially if there is another illness or a change in other medication. If unusual symptoms or side-effects occur whilst on medication it is important to inform the doctor immediately.
Most women with heart disease are able to undergo a normal pregnancy and delivery.
The exceptions are those with severe cyanosis when there is usually insufficient oxygen in the blood supply to the placenta to sustain the baby. Most of these pregnancies spontaneously abort.
Women with pulmonary hypertension (high lung artery pressure) are not usually advised to get pregnant as there is a serious danger to their life.
As with any medical problem it is essential that medical advise is taken - preferably before the event so that the pregnancy can be monitored and if treatment is necessary it can be undertaken early.
If a women herself has a heart problem then there is an increased risk that her child will have a problem too. The risk is around 6%. If a man has a heart problem then the risk is 2%. If the couple have had a previously affected child then the risk is about 2%. The risks quoted above are averages - the actual risk varies considerably between the various heart conditions. There is also some evidence that taking vitamins for 3 months prior to and the first 3 months of the pregnancy can reduce the chance of heart disease occurring in the baby.