Heart and high blood pressure issue.

LV diastolic dysfunction. Trivial MR & TR, Doppler estimated pulmonary artery pressure is 30 mm of Hg. Rest normal velocities and color flow mapping seen across both aterio-ventricular & semilunar valves. No evidence of intra- cardiac shunt. Type I-II LV diastolic dysfunction. Trivial MR. Above finding is mentioned in 2D echo report. ECG is normal. Bp is 130/80 and pulse rate 90. Currently my mother is taking stamlo 2.5 mg daily since 1.5 years. Now doctor told to take concor 5 mg instead stamlo 2.5 mg. My mother has stomach fullness and gas like problem since last 4 months and doctor told that this gas problem is due to heart related.  Ultrasound of abdomen is normal. Due to this doctor told us to do stress test. Is above 2D echo report is normal for 65 age female. Is stress test is necessary ?