Congenital Heart Diseases

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Congenital Heart Diseases

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pr20
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03/09/08 - 06:37 PM

A newborn is observed to be cyanotic immediately after birth.Diagnostic studies,including an ultrasound,reveal that the baby has persistent truncus arteriosus.Which of the following additional defects is this baby most likely to have?

A.Dextrocardia

B.Membranous ventricular septal defect

C.Secundum-type atrial septal defect

D.Tetralogy of fallot

E.Transposition of the great arteries

new_n_lost
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03/09/08 - 10:00 PM

A.Dextrocardia >> Double outlet Right Ventricle ( both Aortas arising from RV)

B.Membranous ventricular septal defect >>> Persistent Truncus Arteriosus

C.Secundum-type atrial septal defect >> ToF, TGA

D.Tetralogy of fallot >> You name it and they will have it.

E.Transposition of the great arteries >> ASD, VSD & PDA

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yarab99
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03/09/08 - 11:12 PM

B-membranous VSD

SILVER
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03/10/08 - 12:43 AM

B

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Tiff
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03/10/08 - 12:01 PM

B - Membranous VSD

pr20
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03/11/08 - 08:56 AM

new_n_lost wrote:
A.Dextrocardia >> Double outlet Right Ventricle ( both Aortas arising from RV)

B.Membranous ventricular septal defect >>> Persistent Truncus Arteriosus

C.Secundum-type atrial septal defect >> ToF, TGA

D.Tetralogy of fallot >> You name it and they will have it.

E.Transposition of the great arteries >> ASD, VSD & PDA

pr20
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03/11/08 - 09:05 AM

Answer is B.

Persistent truncus arteriosus results from failure of the aorticopulmonary septum to form.Normally,the aorticopulmonary septum divides the truncus arteriosus in to the ascending aorta and the pulmonary trunk.The aorticopulmonary septum also contributes to the formation of the membranous portion of the interventricular septum.When the aorticopulmonary septum does not form,the truncus arteriosus persists rather than being divided,and the membranous interventricular septum is incomplete.Because neural creast cells contribute to the formation of the aorticopulmonary septum,it is believed that this defect may result from a defect in migration of neural crest cells.

Ig F
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04/02/08 - 03:55 PM

good work nnl and pr20...

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