A 28-year-old woman comes to the physician for a 6-month history of progressive shortness of breath and fatigue. ECG shows a right bundle branch block and right-axis deviation. Chest x-ray shows increased pulmonary vascular markings. She is prescribed bosentan. Which of the following cardiac findings is most likely to be seen in this patient?
2/6 holo-diastolic murmur along the right sternal border
2/6 holo-systolic murmur at the lower left sternal border
2/6 mid-systolic murmur at the upper right sternal border
3/6 rumbling diastolic murmur heard best at the apex
Fixed, wide splitting of S2
To-and-fro murmur
