I had an aortic valve replacement in June of 2010. By the end of July, my heart rate, after being in the 60's-70's all my life, jumped up to 109 and has stayed high ever since. It is always higher in the morning. My cardiologist dismisses my concerns...what should I do? See another cardiologist? I am currently on Metaprolol. I thought the HR would go DOWN after the surgery, but it seems to be getting worse. Thank you for answering my question!!