Cardiac catheterization is very helpful in evaluating which valve abnormalities?

• A. Stenotic and Regurgitant
• B. Stenotic and Prolapse
• C. Regurgitant and Prolapse
• D. Calcified and Stenotic

Answer: (A)

Cardiac catheterization provides direct hemodynamic measurements that are most informative for valve function. When a valve is stenotic, the narrowing creates a pressure gradient across the valve, and catheterization can quantify that gradient between the chambers (for example, LV to aorta) to assess severity and guide treatment. When a valve is regurgitant, abnormal backflow alters pressures and flow, and catheter data help gauge the hemodynamic impact, such as elevated filling pressures and the resulting chamber pressure changes that reflect the extent of regurgitation.

leaflet prolapse is a structural leaflet abnormality best seen with imaging like echocardiography, not by catheterization, and calcification is a structural change typically identified on imaging as well; cath mainly informs the functional consequences (how badly the valve is affecting pressures and flows). Hence, the most helpful evaluation by catheterization lies with stenotic and regurgitant lesions.