The Nurse Is Evaluating Activity Tolerance in a Patient with Mitral

The nurse is evaluating activity tolerance in a patient with mitral valve stenosis. Which finding would the nurse evaluate as indicating the patient tolerated ambulating in the hall?. Select all that apply.

A) The heart rate, measured 3 minutes after the patient returned to bed, was at the patient's normal level.
B) Blood pressure taken at the halfway point of ambulation was not significantly different from the preambulation level.
C) The patient does not complain of being tired when ambulating.
D) The patient's pulse oximetry reading goes up slightly right after ambulation.
E) The patient's respiratory rate is at normal level at the end of the walk.