Atrial Septal Defects (ASD)
The
heart consists of 4 chambers. Two upper chambers called
right and left atrium are separated by a wall called
atrial septum. A defect or hole in this wall is called
Atrial Septal Defect or ASD. This results in increased
blood flow through lungs. This is usually asymptomatic
and picked up during a routine examination. Left untreated
it causes the pressure in lungs to increase decreasing
life expectancy. Diagnosed by Echocardiography, it is
Ideally closed before the child goes to school. The risk
of surgery is < I %. This surgery is also done in
our center through a small incision under the right breast
for young girls so that the scar is hidden.
Ventricular Septal Defects (VSD)
Ventricular
Septal Defects are much more complex problems. The lower two
chambers of heart, called the right and left ventricles are
separated by a wall called ventricular septum. A hole in this
wall is called a Ventricular Septal Defect. Ventricular Septal
Defects can be associated with other defects. This is the commonest
congenital cardiac defect. Small ventricular septal defects
usually close by 8 yrs. of age, and can be followed up. This
like ASD also causes a increased blood flow through lungs.
Diagnosis is by Echocardiography. Decision about surgical closure
of these defects are made based on the size of the hole, situation
of the hole and the pressure in the lungs. Your surgeon will
advice on the need and timing of surgery. Uncomplicated VSD's
are ideally closed before child goes to school. Risk is < 1%.
Patent Ductus Arteriosus
(PDA)

This is a persistent communication between the descending thoracic
aorta and left pulmonary artery. This is an absolute need for
foetal circulation when the child is in the uterus. Soon after
birth this closes. If not it needs to be closed. Currently
most of these are closed by catheter based techniques without
surgery. Surgical closure involves opening the left side of
chest and interrupting the duct. It can be a very demanding
operation if it is detected late in an adult.
Tetralogy of Fallot (TOF)

Tetralogy of fallot is the most common cyanotic heart disease
and we have a large experience in this entity. It is the defect
commonly causing a "blue baby". This is a complex
defect having 4 components including a VSD & Obstruction
to the blood flow to the lungs. Diagnosis is based on Echo.
Cardiac cath may be needed at times. Complete correction can
safely be done with very good results. Some times in young
children when the arteries to lung are not well developed a "shunt" operation
is done first before definitive total correction.
Coarctation of Aorta
This
may present at any age. This is a severe narrowing of the
aorta after it gives off the left upper limb artery. This
results in decreased blood flow to lower half of body and
increased pressure in the upper half. Diagnosis is by CT/MRI.
Angiography is seldom needed. Surgery involves opening
through the left chest, excising the narrowed segment and
restoring the blood flow by different techniques including
interposing a piece of prosthetic graft of suitable size.
We have a very good series with gratifying results.
Other Anomalies
Other complex anomalies, which our center has successfully handled
are Total anomalous pulmonary venous connection (TAPVC), A-V
canal defects, Double outlet right ventricle (DORV), Ebsteins
Anomaly, Tricuspid atresia, Aorto-pulmonary window and coronary
A-V fistula.
Neonatal
Surgery
Presently
the center does not have the
infrastructure to handle neonatal
cardiac work. This will be
a future direction
Late
Results
The most gratifying aspect of Congenital heart surgery is giving
the patient a cure unlike other cardiac problems. Majority
of common defects corrected at the right time will have an
absolutely normal life comparable to other kids of their age.