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Transplantation of Pulmonary Valve Using a Mouse Model of Heterotopic Heart Transplantation
Published on: July 23, 2014
Function of the anatomic pulmonary valve in the systemic circulation
K J Jenkins1, F L Hanley, S D Colan
1Department of Cardiology, Children's Hospital, Boston, MA 02115.
Circulation
|November 11, 1991
Summary
The pulmonary valve, repurposed as a neoaortic valve, shows a high incidence of regurgitation after complex heart surgeries like arterial switch operation (ASO) and hypoplastic left heart syndrome (HLHS) repair. However, significant stenosis is not observed, indicating acceptable long-term function in most cases.
Area of Science:
- Cardiovascular Surgery
- Pediatric Cardiology
- Congenital Heart Disease
Background:
- The pulmonary valve is repurposed as a neoaortic valve in complex congenital heart surgeries.
- Long-term function of the pulmonary valve in the systemic circulation is not well understood.
Purpose of the Study:
- To investigate the long-term function of the pulmonary valve when used as a neoaortic valve.
- To assess the incidence of neoaortic regurgitation and stenosis after specific surgical procedures.
Main Methods:
- Retrospective review of echocardiograms, catheterization data, and angiograms for 189 patients.
- Analysis of outcomes after arterial switch operation (ASO), hypoplastic left heart syndrome (HLHS) repair, and pulmonary artery-to-aortic (P-A) anastomosis.
- Examination of factors influencing valve function, including preoperative anatomy, pulmonary artery banding (PAB), and follow-up duration.
Main Results:
- Neoaortic regurgitation was observed in 41% after ASO, 60% after HLHS repair, and 50% after P-A anastomosis.
- Only eight patients had more than trivial/mild regurgitation; no neoaortic stenosis was observed.
- Prior PAB placement increased regurgitation likelihood after two-stage ASO, and intact ventricular septum was associated with higher regurgitation in ASO patients.
Conclusions:
- The pulmonary valve functions as a neoaortic valve with a high prevalence of regurgitation but minimal stenosis in the long term.
- Factors like prior PAB and ventricular septal integrity influence neoaortic regurgitation after specific congenital heart surgeries.
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