Advanced Tricuspid Valve Quiz

Q1. Which conduction structure lies near the septal tricuspid cusp?

• Sinoatrial node
• Left bundle branch only
• Purkinje network of the left ventricle
• Atrioventricular node

Q2. Which landmark forms one boundary of the triangle containing the AV node?

• Anterior mitral leaflet
• Septal tricuspid leaflet
• Pulmonary valve
• Left atrial appendage

Q3. Which papillary muscle receives the moderator band?

• Posteromedial papillary muscle
• Anterior papillary muscle
• Septal papillary muscle
• Posterior papillary muscle

Q4. Which conduction fibers travel within the moderator band?

• Right bundle branch fibers
• Left bundle branch fibers
• SA nodal fibers
• Vagal fibers only

Q5. Do papillary muscles actively close the tricuspid valve?

• No, they stabilize the cusps
• Yes, they pull the cusps shut
• No, they actively open the valve
• Yes, during diastole only

Q6. What can result from failure of tricuspid cusp coaptation?

• Mitral stenosis
• Pulmonary atresia
• Aortic stenosis
• Tricuspid regurgitation

Q7. During normal systole, tricuspid closure prevents flow in which direction?

• Right ventricle to right atrium
• Right atrium to right ventricle
• Pulmonary trunk to pulmonary arteries
• Right ventricle to pulmonary trunk

Q8. Which components form the tricuspid valve apparatus?

• Right atrium and venae cavae only
• Annulus, cusps, chordae, and papillary muscles
• Pericardium and myocardium only
• Cusps, sinuses, and lunules only

Q9. Why can the tricuspid annulus enlarge in right ventricular dilation?

• The fibrous skeleton completely disappears
• Chamber dilation can stretch the annulus
• The pulmonary valve pulls the annulus open
• The valve develops chordae in the atrium

Q10. Which statement best describes normal tricuspid valve function?

• Allows diastolic filling and prevents systolic backflow
• Allows systolic filling and prevents pulmonary flow
• Opens through papillary muscle contraction
• Directs blood from the left atrium to right ventricle