A 34-Year-Old Man Comes to the Physician Because of Fatigue

A 34-year-old man comes to the physician because of fatigue and shortness of breath with moderate exertion for the past 2 months. Over the past 10 days, he has had low-grade fevers and night sweats. He has no history of serious illness except for a bicuspid aortic valve diagnosed 5 years ago. He has smoked one pack of cigarettes daily for 10 years and drinks 3-5 beers on social occasions. He does not use illicit drugs. The patient takes no medications. He appears weak. His temperature is 37.7°C (99.9°F) , pulse is 70/min, and blood pressure is 128/64 mm Hg. The lungs are clear to auscultation. A grade 2/6 systolic murmur is heard best at the right sternal border and second intercostal space. Laboratory evaluation shows leukocytosis, and chest x-ray reveals nodular opacities. Echocardiography of this patient is most likely to reveal which of the following findings?

A) Aortic regurgitation
B) Aortic stenosis
C) Interventricular septal defect
D) Mitral regurgitation
E) Pulmonic stenosis
F) Tricuspid regurgitation