Adult Echocardiography Practice Exam

Which is the largest leaflet of the tricuspid valve?

1. Septal leaflets

2. Posterior leaflet

3. Anterior leaflet

4. Inferior leaflet

The correct answer is: Posterior leaflet

The largest leaflet of the tricuspid valve is the anterior leaflet. This leaflet plays a crucial role in the function of the valve by ensuring proper blood flow from the right atrium to the right ventricle during diastole. The anterior leaflet’s larger surface area facilitates this function, accommodating the greater volume of blood compared to the other leaflets. In contrast to the anterior leaflet, the posterior and septal leaflets are smaller and serve to help maintain the integrity of the valve structure while closing during ventricular systole to prevent regurgitation. The posterior leaflet, which was mistakenly identified as the largest, is more of a supporting structure rather than the primary functional component. The septal leaflet primarily serves in conjunction with the septal wall, contributing further to the overall sealing of the valve during ventricular contraction but is also smaller compared to the anterior leaflet. Understanding the anatomy and function of these leaflets is important for recognizing the dynamics of right heart function and the implications in various cardiac conditions.