septation 1 tetralogy of Fallot stenosis of the out flow of the Rt ventricle infundibular stenosis is associated with defected interventricular septum overriding ID: 918948
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Slide1
Anomalies of the truncoconal septation:1.tetralogy of Fallot: stenosis of the out flow of the Rt ventricle (infundibular stenosis), is associated with defected interventricular septum, overriding of the aorta, and hypertrophy of the Rt ventricle. It is a cyanotic disease of the new born.
Slide2Slide3Other Anomalies of the truncoconal septation:2.persistent truncus arteriosus: by absence of the truncoconal swellings, associated with interventricular septal defect.3.failure of spiral growth of the truncoconal swellings resulting in transposition of the great vessels, associated with defected interventricular septation and patent ductus
arteriosus
(PDA).
4.
stenosis of the pulmonary valve with PDA. 5.stenosis of the aortic valve.6.aortic valve atresia with PDA.
Slide4Slide5Anomalies of the cardiac position:1.dextrocardia: the heart lies on the Rt side associated with or with out situs inversus (abnormal transposition of abdominal viscera).2.ectopia cordis: the heart lies on the surface of the chest.
Slide6(Easy Go)Arterial system:Each of the pharyngeal arches has its own artery and cranial nerve. These arteries are called aortic arches that originate from the root of the aorta (the aortic sac), and end into the dorsal aorta. There are 6 pairs of aortic arches, in human embryo, the 5th arch often underdeveloped or absent.
Slide7Slide8Slide9(Easy Go)The first aortic arch: largely disappears, remnant of it forms the maxillary artery.The second aortic arch: also disappears, remnant of it forms the hyoidal and stapedial arteries.The third aortic arch: forms the common carotid artery and the beginning of the of the internal carotid artery. Continuation of the internal carotid is derived from the dorsal aorta distal to the third arch.
Slide10(Easy Go)The forth aortic arch: forms the arch of the aorta on the left side between the Lt common carotid artery and the Lt 7th intersegmental artery (which is the primordium of the Lt subclavian artery). On the Rt side, the 4th aortic arch forms the beginning of the Rt subclavian artery
, the continuation of it is derived from the
Rt
dorsal aorta connecting the 4th, 5th, and 6th aortic arches and also by the 7th
intersegmental artery.