A 76-Year-Old Man Comes to the Office Because of Lightheadedness

A 76-year-old man comes to the office because of lightheadedness.  It occurs occasionally while he does yard work and is sometimes accompanied by chest pressure.  He denies any syncope, shortness of breath, or palpitations.  He has a history of hypertension, hyperlipidemia, gout, and osteoarthritis.  He is an ex-smoker.
His blood pressure is 148/78 mm Hg, pulse is 78 /min, and respirations are 16 /min.  The patient's pulse oximetry showed 97% on room air.  His BMI is 28 kg/m².  Cardiac examination reveals a soft S2.  There is a 3/6 late peaking systolic ejection murmur at the right upper sternal border.  The carotid, radial, and femoral pulses are 2+ and are not delayed.  There is 1+ edema in the lower extremities.
Echocardiogram shows normal left ventricular size and function with moderate concentric left ventricular hypertrophy.  The aortic valve is calcified with restricted opening, and the mean gradient across the aortic valve is 50 mm Hg.
Which of the following would be the role of heart catheterization in this patient?

A) Confirm valvular abnormality
B) Define coronary anatomy
C) Measure cardiac output
D) Measure pulmonary arterial pressures
E) Obtain left ventricular ejection fraction