The ____ chamber has a decrease in pressure when evaluating stenotic valves?

The ____ chamber has a decrease in pressure when evaluating stenotic valves?

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

Answer: (A)

When a valve is stenotic, the narrowed opening resists blood flow, creating a pressure gradient across the valve. The chamber before the valve has to generate higher pressure to push blood through, so its pressure rises. The chamber after the valve receives blood that has passed through the narrowed orifice and energy is lost along the way, so its pressure drops relative to the upstream chamber. Therefore, the distal (after) chamber shows a decrease in pressure when evaluating stenotic valves. For example, in aortic stenosis, the left ventricle must generate high systolic pressure, while the aorta (after the valve) has a comparatively lower pressure, producing the gradient. The terms apical or basal don’t describe this pressure change across a valve.

When a valve is stenotic, the narrowed opening resists blood flow, creating a pressure gradient across the valve. The chamber before the valve has to generate higher pressure to push blood through, so its pressure rises. The chamber after the valve receives blood that has passed through the narrowed orifice and energy is lost along the way, so its pressure drops relative to the upstream chamber. Therefore, the distal (after) chamber shows a decrease in pressure when evaluating stenotic valves. For example, in aortic stenosis, the left ventricle must generate high systolic pressure, while the aorta (after the valve) has a comparatively lower pressure, producing the gradient. The terms apical or basal don’t describe this pressure change across a valve.