Thank you, Martin, for your response. This afib thing is all very new to me and disconcerting and confusing. It sounds like it took you a while to get things just right for you. I probably just need to work with my new cardiologist and give it some time. Fortunately my heart is in fairly good shape, just some expected age-related wear and tear but nothing serious. Right now I'm on metoprolol to calm down the heartbeat and lisinopril (only 5 mg.) for the blood pressure. I monitor my blood pressure every day and so far this combo is working well and I'm feeling good. I think going on a heart healthy diet and exercising regularly are helping a lot too. Thank you again for all the information.