You have evidence of what cardiologist call diastolic dysfunction. This is typically related to conditions such as high blood pressure, diabetes, coronary artery or aortic stenosis, however, may also occur with aging and with infiltrative diseases such as amyloidosis, etc. If you do have high blood pressure, you must control it. If there is no high blood pressure than you should have a thorough workup evaluating for those other conditions I mentioned. You have evidence of aortic sclerosis, not stenosis, but if the tech did not get a good pressure tracing, or the valve was not well visualized, the aortic stenosis may be missed. The fact that you have atrial fibrillation also supports the diagnosis of diastolic dysfunction. Typical therapy for this, depending on your symptoms, consists of control of the underlying conditions (high blood pressure, Diabetes, coronary artery disease), and initiation of beta blockers for heart rate control, diuretics such as lasix if there is fluid overload and medications called ace inhibitors to prevent further remodeling (progression) of the disease.