Question
Auscultation of the heart of a 17-year-old boy reveals an increased intensity of the pulmonary component of the second heart sound. He complains of dyspnea on exertion but no other cardiac or pulmonary symptoms. Which of the following explanations is the most likely cause of his dyspnea?

A. |
Pulmonary stenosis |
B. |
Aortic stenosis |
C. |
MI |
D. |
Pulmonary hypertension |
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