Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Ann Thorac Surg. 2000 Feb;69(2):556-61.

Anatomy of the muscular subpulmonary infundibulum with regard to the Ross procedure.

Author information

  • 1Department of Paediatrics, National Heart and Lung Institute, Imperial College School of Medicine, London, England.

Abstract

BACKGROUND:

To clarify the precise anatomical relationship of the muscular subpulmonary infundibulum.

METHODS:

Eleven hearts were dissected, and microscopic sections taken through the arterial trunks of a 37-week-old fetus and of a neonate. The anatomy was also investigated during operative Ross procedures.

RESULTS:

The sinotubular junctions of the pulmonary and aortic roots cross obliquely. The leaflets of the pulmonary valve are lifted away from the ventricular septum by the free-standing subpulmonary infundibulum, whereas the aortic valve is deeply wedged between the atrioventricular junctions. The muscular infundibulum spirals around the aortic root, being longest below the right-facing aortic sinus and shortest below the left. The first septal perforating artery pierces the septum below the shortest part of the infundibulum, sometimes within a millimeter of the pulmonary valvar hinge, but a muscular sleeve lifts the pulmonary leaflets from the septal musculature.

CONCLUSIONS:

The pulmonary valvar leaflets are supported entirely by free-standing musculature, having no direct relationship with the ventricular septum. This makes possible the Ross procedure.

Comment in

PMID:
10735698
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Icon for Elsevier Science
    Loading ...
    Write to the Help Desk