Aortic valve regurgitation is defined as:

Aortic valve regurgitation is defined as:

• A. Narrowing of the aortic valve restricting flow from LV to the aorta
• B. Incomplete closure of the aortic valve causing backflow into the left atrium
• C. Thickening of the aortic valve without leakage
• D. Incomplete closure of the aortic valve allowing backflow into the left ventricle, with LV hypertrophy and potential heart failure

Answer: (D)

Aortic valve regurgitation occurs when the aortic valve leaflets fail to close properly, allowing blood to flow backward from the aorta into the left ventricle during diastole. This diastolic backflow creates a volume overload on the left ventricle, which responds by dilating and undergoing eccentric hypertrophy to accommodate the extra blood. Over time, this increased volume load can lead to left ventricular dysfunction and heart failure if the regurgitation is chronic and significant. That is why the best description emphasizes the incomplete closure with backflow into the left ventricle and the resulting LV hypertrophy. The other descriptions don’t fit because one refers to narrowing of the valve (aortic stenosis), another to thickening without leakage (valve sclerosis or stenosis without regurgitation), and another incorrectly states backflow into the left atrium, which would be characteristic of mitral or other valvular issues rather than purely aortic regurgitation.

Aortic valve regurgitation occurs when the aortic valve leaflets fail to close properly, allowing blood to flow backward from the aorta into the left ventricle during diastole. This diastolic backflow creates a volume overload on the left ventricle, which responds by dilating and undergoing eccentric hypertrophy to accommodate the extra blood. Over time, this increased volume load can lead to left ventricular dysfunction and heart failure if the regurgitation is chronic and significant. That is why the best description emphasizes the incomplete closure with backflow into the left ventricle and the resulting LV hypertrophy.

The other descriptions don’t fit because one refers to narrowing of the valve (aortic stenosis), another to thickening without leakage (valve sclerosis or stenosis without regurgitation), and another incorrectly states backflow into the left atrium, which would be characteristic of mitral or other valvular issues rather than purely aortic regurgitation.