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Questions and Answers
What is the preferred orientation of monoleaflet valves in the aortic position?
What is the preferred orientation of monoleaflet valves in the aortic position?
- Major orifice toward the left ventricular free wall
- Major orifice pointing upward
- Major orifice toward the septum
- Major orifice toward the right posterior aortic wall (correct)
What type of flow pattern is characterized by bileaflet mechanical valves?
What type of flow pattern is characterized by bileaflet mechanical valves?
- Two separate jets laterally
- Single antegrade jet
- Circular flow pattern
- Three separate jets due to a smaller central orifice (correct)
What is the range of the opening angle of the leaflets of bileaflet valves relative to the annulus plane?
What is the range of the opening angle of the leaflets of bileaflet valves relative to the annulus plane?
- 75 to 90 degrees (correct)
- 90 to 105 degrees
- 105 to 120 degrees
- 60 to 75 degrees
Which type of valve shows a small amount of normal regurgitation with an approximate volume of 5-9 mL per beat?
Which type of valve shows a small amount of normal regurgitation with an approximate volume of 5-9 mL per beat?
What is suggested as an optimal orientation for bileaflet valves in the mitral position?
What is suggested as an optimal orientation for bileaflet valves in the mitral position?
Which type of bileaflet valve does not show a clear advantage in specific leaflet orientation when implanted in the aortic position?
Which type of bileaflet valve does not show a clear advantage in specific leaflet orientation when implanted in the aortic position?
What is the main mechanism responsible for the thrombogenicity of the Starr-Edwards 1260 valve?
What is the main mechanism responsible for the thrombogenicity of the Starr-Edwards 1260 valve?
Which component of the Starr-Edwards 1260 valve is primarily visualized on colorflow Doppler imaging?
Which component of the Starr-Edwards 1260 valve is primarily visualized on colorflow Doppler imaging?
What is the purpose of lateral or central metal struts in monoleaflet or tilting-disk valves?
What is the purpose of lateral or central metal struts in monoleaflet or tilting-disk valves?
What results from the opening angle of the disk relative to the valve annulus being between 60 to 80 degrees in monoleaflet or tilting-disk valves?
What results from the opening angle of the disk relative to the valve annulus being between 60 to 80 degrees in monoleaflet or tilting-disk valves?
What distinguishes the flow through the major orifice from that through the minor orifice in monoleaflet or tilting-disk valves?
What distinguishes the flow through the major orifice from that through the minor orifice in monoleaflet or tilting-disk valves?
Why is the Starr-Edwards 1260 valve no longer implanted despite its relatively good durability?
Why is the Starr-Edwards 1260 valve no longer implanted despite its relatively good durability?
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