Adult Echocardiography Practice Exam

What indicator suggests severe tricuspid regurgitation in echocardiography?

1. Diastolic flow reversal

2. Systolic flow reversal

3. Mild systolic dysfunction

4. Normal valve closure

The correct answer is: Systolic flow reversal

Severe tricuspid regurgitation can be identified through various echocardiographic findings, one of which is systolic flow reversal in the inferior vena cava (IVC). This phenomenon occurs due to elevated right atrial pressures, leading to abnormal flow dynamics throughout the venous system. In the case of severe tricuspid regurgitation, the pressure gradient between the right atrium and the IVC during systole is significant enough that it can cause a reversal of flow in the IVC. This observation is critical as it reflects increased right atrial pressure, which is a direct consequence of significant backflow caused by the incompetent tricuspid valve. Recognizing this condition during an echocardiographic assessment is essential as it informs clinical decision-making regarding the severity of the regurgitation and potential interventions. Other answers, while related to heart function and valve performance, do not specifically indicate the severity of tricuspid regurgitation in the same way that systolic flow reversal does. For instance, diastolic flow reversal may suggest issues in the context of other cardiac evaluations but is not a definitive indicator of tricuspid regurgitation. Similarly, mild systolic dysfunction and normal valve closure indicate different cardiac conditions unrelated to severe tr