I had a cardiac arrest in June woke up 3 weeks later in hospital. Stayed another 5 weeks in icu and therapy, came home aug 23. Scheduled bypass for mid oct to fix 2 100% blockages but heart not coming back to full power so sicd placement scheduled. I am very fearful of the surgery - I know it’s not a huge deal compared to Cabg but see,s like I am waiting for something to go wrong. How is the icd surgery-should I be worried?