persistent truncus arteriosus

per·sis·tent trun·cus ar·te·ri·o·'sus

a congenital cardiovascular anomaly resulting from failure of development of the spiral aorticopulmonary septum and consisting of a common arterial trunk opening out of both ventricles, the pulmonary arteries being given off from the ascending common trunk.

per·sis·tent trun·cus ar·te·ri·o·sus

(pĕr-sis'tĕnt trungk'ŭs ahr-tē'rē-ōsŭs)

A congenital cardiovascular anomaly resulting from failure of development of the spiral septum and consisting of a common arterial trunk opening out of both ventricles, the pulmonary arteries being given off from the ascending common trunk.

persistent

relative to embryological defects refers to persistence of an entity into external life in such a way as to cause some reduction of efficiency. The common defects are listed under the names of the compromised organs. See also persistent right aortic arch, ductus arteriosus, penile preputial frenulum, imperforate hymen, persistent urachus, persistent hyperplastic vitreous, persistent pupillary membrane.

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persistent corpus luteum

see corpus luteum.

persistent ductus arteriosus

see patent ductus arteriosus.

persistent ductus venosus

see ductus venosus.

persistent omphalomesenteric duct

see omphalomesenteric duct.

persistent posterior perilenticular vascular tunic

the tunic is generated in the embryo but atrophies just before birth. Persistence of some part of the tunic into adult life is common but of no clinical significance.

persistent recumbency

the animal is normal in other respects but does not rise to its hooves for a period exceeding 24 hours.

persistent right aorta arch

see persistent right aortic arch.

persistent truncus arteriosus

may cause neonatal congestive heart failure and cyanosis; the interventricular septum is usually patent. See also truncus arteriosus.