I have a full stomach, upset stomach after eating, quickly full and especially when I sit down, my stomach hurts, it's okay to lean or stand (first symptom) 1 month ago, I want to check HP after treatment with blood test is that Okay?

Hi doctor. This year, she is 25 years old and went to a health examination to perform an electrocardiogram and was diagnosed with myocardial ischemia. I went to the heart hospital to check again: electrocardiogram, blood test, strenuous jogging, echocardiography, the results they said were normal, but the only electrocardiogram still showed signs of myocardial ischemia. So let me ask, can the electrocardiogram be affected by other factors, so there are signs of myocardial ischemia? Recently, I have been sad about love and family problems. Please advise me, thank you doctor.