An 18-year-old female presents to your clinic complaining of progressive dyspnea. She denies chest pain and recent history of infectious disorders. Her blood pressure is 160/110 mm Hg in both arms and 110/70 in both thighs. Physical examination reveals that she has a short stature, a webbed neck, a shield chest with wide-set nipples, and significantly weak femoral pulses bilaterally. Auscultation reveals continuous murmur loudest at the left infrascapular region. Chest x-ray reveals notching of the ribs. Echocardiogram revealed a bicuspid aortic valve. Which of the following is the most likely diagnosis in this patient?
