MRCP UK EXAMINATIONS

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CARDIOLOGY

PROSTHETIC HEART VALVES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
At the end of the third week, the common trunk divides into the pulmonary artery and the aorta through a spiral growth process; if there is a disruption in any of these mechanisms, ____ can result.
A
coarctation of the aorta
B
endocardial cushion defect
C
TGA
D
truncus venosus
Explanation: 

Detailed explanation-1: -Transposition of the great arteries (TGA) is a congenital pediatric cardiac defect arising from an embryological discordance between the aorta and pulmonary trunk.

Detailed explanation-2: -Transposition of the great arteries occurs during pregnancy when the baby’s heart is developing. The cause is most often unknown. To understand transposition of the great arteries, it may be helpful to know how the heart typically pumps blood.

Detailed explanation-3: -Patent ductus occurs twice as often in girls as in boys. Almost all babies are born with a small connection between the pulmonary artery and aorta, called the ductus arteriosus. During pregnancy, this opening is necessary to allow oxygen-rich (red) blood to bypass the baby’s lungs and flow into the body.

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