question: I have slight pressure in the chest, similar to a mild pulled muscle, just under the xiphoid process of the sternum. Started this morning. Pressure is noticeable, not unbearable, and comes and goes. First thought it could be a pulled muscle as I did physical therapy exercises for by lower back last evening. I am on Losartan-hydrochlorothiazide 100/25 for high blood pressure. Concerned could be my heart? I am a 58 year old male. YYYY@YYYY Thank you.