Suggest Treatment For Diastolic Dysfunction And Left Ventricular Hypertrophy

Hi: I m a 53 year old female. Last Sunday I had a frightening pain that was between my shoulder blades that lasted approximately 5 minutes. I went to Urgent Care where they did an ECG which they said was slightly abnormal. They transported me to ER where another ECG was done that was slightly abnormal. Cardiac Enzyme testing came back negative and then 4 hours later they did another one which was negative. They referred me to a cardiologist who I saw the next day. They scheduled me for a nuclear stress test and an echocardiogram. I went back for results and I only saw teh Physicians Assistant. She told me the ECG on the stress portion showed a mild old septal wall MI in my past ?? The echocardiogram said I had mild left ventricular hypertrophy with GRADE 1 (relaxation abnormality) diastolic dysfunction. I had some trace tricuspid and mitral regurgitation. I decided to get a second opinion because they wanted to do another test. The new cardiologist stated that he did not think I had a heart attack and only wanted to put me on a Beta Blocker. I m not sure who to believe. Also, I was uncertain as to another thing, on the Nuclear Stress Test it said I had an effusion fraction of 92% and on the echocardiogram it said it had visually a EF of 65%, which one of these is correct. If it is 92% it should be concerning, right? I do not know if I should go to another cardiologist and see what they think or which one to trust.