
The condition can cause long-term illness and increased risk of death, even after surgical intervention. All the subjects in the study had previously undergone a procedure called a Fontan surgery to divert blood flow to the lungs. However, those blood vessels can become resistant, lessening the benefit of surgical treatment.
Echocardiograms showed that the drug had dramatically improved the heart's blood pumping capacity in those treated. The study was published in the journal Pediatric Cardiology.