Hi: I'm both an HF patient and an RN, and I've had an implanted pacemaker/defibrillator since 2020. Everybody's experience with implanted cardiac devices is different, but mine has been pretty easy. It's important to know what device is being placed, what it's expected to do (or not do), and when you should consider calling for assistance. In my case, my AICD hasn't had to defibrillate me since it's been placed, but it has paced my heart rythyms when they've been abnormal. The pacing part is painless; the shock from the defibrillator is, I'm told, like getting kicked by a mule. No mules yet! The key thing to make this work for you will be information; the more you and your cardiologist know about how you're doing and what the device is up to, the better your life will be. It can help reduce your fatigue by making sure that your heart is beating properly, as best as it can with HF. I understand the fear; don't let it prevent you from living the fufllest life you can. Good luck!