FCOG-1229
A 28-year-old G1P0 patient at 24 weeks of gestation visits your office complaining of some shortness of breath that is more intense with exertion and denies any chest pain. She is concerned as she has always been very athletic and is unable to maintain the same degree of exercise she was accustomed prior to becoming pregnant. Patient also informed she has no significant past medical history and is not on any medication. On physical examination, her pulse is 72 beats per minute, with a blood pressure of 100/70 mm Hg. Cardiac examination is normal and her lungs are clear to auscultation and percussion. Which among the following is considered the most appropriate next step to pursue in the workup of this patient?