The ____ chamber has an increase in pressure when evaluating stenotic valves?

The ____ chamber has an increase in pressure when evaluating stenotic valves?

• A. Proximal (Before)
• B. Distal (After)
• C. Apical
• D. Basal

Answer: (A)

When a valve is stenotic, the blood has to push through a narrowed opening, so the chamber before the valve must generate higher pressure to overcome the obstruction. This means the proximal (before) chamber shows an increased pressure, while the distal chamber tends to run at a lower pressure depending on flow. In practice, this upstream pressure rise creates the transvalvular gradient that clinicians measure. For example, with aortic stenosis the left ventricle (proximal to the aortic valve) has higher systolic pressure as it works to eject through the narrowed valve. Thus, the correct concept is that the proximal chamber experiences the increased pressure.

When a valve is stenotic, the blood has to push through a narrowed opening, so the chamber before the valve must generate higher pressure to overcome the obstruction. This means the proximal (before) chamber shows an increased pressure, while the distal chamber tends to run at a lower pressure depending on flow. In practice, this upstream pressure rise creates the transvalvular gradient that clinicians measure. For example, with aortic stenosis the left ventricle (proximal to the aortic valve) has higher systolic pressure as it works to eject through the narrowed valve. Thus, the correct concept is that the proximal chamber experiences the increased pressure.