@kb49 I had my PM implanted 4 years ago. I explained that I still had chest tightness and exhaustion. They paid no attention to me until I made an appointment with an electrophysiologist (who had nothing to do with implanting the PM). He was able to reprogram some of the settings to make me feel better. You need to learn how the device works and find an EP who will work with you. You may be missing the boat if you don’t.