Prosthetic Valves Flashcards
What angle do the leaflets move between in the St. Jude mechanical valve?
Between 30 and 85 degrees
In the mitral position, are mechanical valves usually implanted in the anatomic or antianatomic position?
In the antianatomic position (opening is perpendicular to native MV commissure)
(Blood flow more likely to move leaflets equally and subvalvular apparatus less likely to interfere with leaflets in antianatomic position)
St Jude valve vs. On-X valve: echo signatures
St. Jude:
- leaflets hinge above sewing ring
- convergent washing jets
On-X:
- leaflets hinge within plane of sewing ring
- parallel washing jets
What is the normal peak velocity for a mechanical/prosthetic aortic valve?
<3m/sec
What is the normal mean gradient for a mechanical/prosthetic aortic valve?
MG <20mmHg
What is the normal DVI for a mechanical/prosthetic aortic valve?
DVI >/= 0.3
What is the normal EOA for a mechanical/prosthetic aortic valve?
EOA >1.2
What is the normal AT for a mechanical/prosthetic aortic valve?
AT <80msec
What is the normal peak velocity for a prosthetic mitral valve?
<1.9m/sec
What is the normal mean gradient for a prosthetic mitral valve?
MG </= 5mmHg
What is the normal EOA for a prosthetic mitral valve?
EOA >/= 2.0cm2
What is the normal PHT for a prosthetic mitral valve?
<130msec
What is the normal peak velocity for a prosthetic tricuspid valve?
<1.7 m/sec
What is the normal mean gradient for a prosthetic tricuspid valve?
<6mmHg
What is the normal PHT for a prosthetic tricuspid valve?
<230msec
