I have congestive heart failure and had an infarction rate of 24. Have a valve that leaks. I have a pacemaker/defib mechanism (2nd one) and I think I do great. I am still working (sedentary job), am an active grandmother, lovely life. I am getting tired again... feel like I have to stop and catch my breath (NOT during exercise)... dizzy. After the device, cardiologist says I just need to come in once a year... I should be fine. I am going to another doctor.. Am I wrong to want to know what my rate is now, and if the valve is ok? I am just "feeling not right".