Without medicines and a series of three surgeries to rebuild the heart,
babies with hypoplastic
left heart syndrome (HLHS) won't survive. The left side of the heart can't be
fixed, so the goal of the surgeries is to rebuild parts of the heart and "redirect"
the way blood flows.
The last surgery in the series is the Fontan procedure. Children
get this after the Glenn procedure,
usually when they're 18 to 36 months (3 years) old. Until now, blood low in oxygen
from the lower part of the body has mixed with blood high in oxygen.
Make blood from the lower part of the body go directly to the lungs. This lets
the blood pick up oxygen without having to pass through the heart.
In babies with hypoplastic left heart syndrome, low-oxygen blood
from the lower part of the body mixes with high-oxygen blood. After the Fontan procedure,
low-oxygen blood and high-oxygen blood no longer mix. This lets the heart deliver
only high-oxygen blood to the body.
What Happens During the Fontan Procedure?
The Fontan procedure involves redirecting blood flow from the lower body to the
lungs. In the Fontan procedure:
Often, a small hole or "fenestration" is created between the
Fontan conduit and the right
atrium. This lets some blood still flow directly back to the heart and acts as
a "pop-off" valve as the lungs get used to the extra flow from the lower part of the
body. This hole can be closed later with a cardiac
Blood from the lower body now goes to the pulmonary artery, and
then to the lungs, without
having to go to the heart. The right ventricle remains the
main pump and now just sends blood coming back from the lungs with oxygen out to the
After the Fontan procedure, blood high in oxygen and blood low in oxygen are separated.
That means more oxygen can get to the body.
What Happens After the Fontan Procedure?
Children who have the Fontan procedure usually spend 1 to 2 weeks in the hospital
to recover. They get-around-the-clock care and monitoring. They also get medicines
to help the heart and improve blood flow.
What Else Should I Know?
Many children thrive and do well after heart surgery. They'll need to get lab tests
often and occasional catheterizations.
To help keep your child as healthy as possible:
Go to all doctors visits.
Give all medicines as directed.
Follow the guidelines from your care team.
Sometimes, the three heart surgeries may not totally fix all heart problems or
the right ventricle can tire out over time. In these cases, a child may need a heart transplant.