Exertional syncope – MCQ – Answer

Exertional syncope – MCQ – Answer

Which of the following lesions is most likely to cause exertional syncope? Correct answer: d) Severe Aortic stenosis

In severe aortic stenosis, cardiac output is almost fixed and cannot rise much with exercise. When peripheral vasodilation occurs with exercise, hypotension and syncope due to cerebral hypoperfusion ensues.

Another condition which can cause syncope after exertion is hypertrophic obstructive cardiomyopathy in view there is obstruction to left ventricular outflow.

Patients with severe pulmonary hypertension can also develop exertional syncope.

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