An older adult presents with angina, dyspnea on exertion, and syncope. What is the MOST likely diagnosis based on examination findings?

The most likely diagnosis in this scenario is aortic stenosis. This condition is characterized by a narrowing of the aortic valve opening, which leads to an obstruction of blood flow from the heart into the aorta during systole. The classic triad of symptoms associated with aortic stenosis includes exertional dyspnea, angina, and syncope, all of which are present in this patient.

Exertional dyspnea occurs due to the heart's inability to increase cardiac output during physical activity, while angina is the result of the heart muscle not receiving enough oxygen to meet increased demands. Syncope, or fainting, typically happens due to decreased cerebral perfusion, especially during exertion or standing, which can occur when the heart cannot effectively pump blood against the resistance created by the narrowed valve.

Other conditions mentioned in the options can present with similar symptoms but do not align as closely with the classic presentation. Aortic regurgitation typically presents with different symptoms, such as bounding pulses and diastolic murmur, and does not usually cause syncope. Mitral valve prolapse may cause palpitations and chest pain, but it's less likely to result in syncope and significant exertional dyspnea compared to aortic sten