MRCP UK EXAMINATIONS

CARDIOLOGY

PROSTHETIC HEART VALVES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If the patient’s pulmonic valve annulus and trunk are excised and relocated to the aortic position, they have a(n) ____
A
allograft
B
autograft
C
heterograft
D
homograft
Explanation: 

Detailed explanation-1: -The Ross procedure, also known as the switch procedure or pulmonary autograft procedure, is a cardiac surgery in which a diseased aortic valve is replaced with the patient’s own pulmonary valve. This is followed by the replacement of the pulmonary valve with a pulmonary allograft.

Detailed explanation-2: -This is because the stress and pressure on a valve are lower in the pulmonic position than on the systemic side of the circulation, and patients tolerate residual pulmonary valve regurgitation much better than aortic valve regurgitation.

Detailed explanation-3: -pulmonary valve: located between the right ventricle and the pulmonary artery. mitral valve: located between the left atrium and the left ventricle. aortic valve: located between the left ventricle and the aorta.

Detailed explanation-4: -There are two types of heart valves; the atrioventricular valves (mitral, tricuspid) and the semilunar valves (aortic and pulmonic). The pulmonic valve physically separates the right ventricle from the pulmonary trunk.

There is 1 question to complete.