What condition is characterized by a large peak pressure difference between the left ventricle and aorta?

• A. Aortic stenosis
• B. Mitral regurgitation
• C. Hypertrophic cardiomyopathy
• D. Aortic regurgitation

Answer: (A)

Aortic stenosis is characterized by a significant peak pressure difference between the left ventricle and the aorta. This condition occurs when the aortic valve becomes narrowed, which restricts blood flow from the left ventricle into the aorta during systole. As a result, the left ventricle has to generate much higher pressures to overcome this obstruction in order to eject blood.

The large pressure gradient that develops reflects the amount of effort the left ventricle must exert to push blood through the narrowed valve. Clinically, this is often measured via echocardiography or during cardiac catheterization, where significant differences in pressure readings can be observed between these two chambers. Symptoms associated with aortic stenosis may include exertional dyspnea, angina, and syncope, primarily due to the reduced cardiac output and increased workload on the heart.