Review Question - QID 207867

A 74-year-old female with a history of hypertension, dyslipidemia, and osteoarthritis presents to her primary care physician because of worsening shortness of breath and intermittent chest discomfort. The patient reports that she is usually able to walk five blocks around her cul de sac, but lately this same walk causes her these symptoms. She also complains of mild chest pain that began yesterday. Vital signs are as follows: T 98.8 F, HR 90 bpm, BP 150/100 mmHG, RR 15, O2 Sat 96%. On exam, carotid pulses are noted to be delayed from the cardiac cycle. Cardiac auscultation is notable for a late-peaking crescendo-decrescendo systolic ejection murmur loudest over the right upper sternal border. The patient is referred to the emergency department, where cardiac enzymes are negative. An EKG is shown in Figure A. The patient is referred for an echocardiogram, and pressure gradient recordings across the aortic valve are shown in Figure B. Which of the following is the appropriate next step for this patient?