my husband age 49 has has had tightness in his chest for 2-3 weeks now. We went to the ER and they determined his blood tests were normal, lung sounds, blood pressure, pulse, ekg, chest xray and ultrasound of liver,kidneys, gall bladder and aorta all normal. admitted overnight, never could determine cause. He has asthma and family history of heart disease but everything is checking out normal. He is healthy, active and not overweight. We plan to follow up with a cardiologist this week and have a stress test done but all indication shows this is probably not his heart, nor is it his asthma as albuterol has offered no relief. Could this be anxiety? Any other ideas?