Of course, EF is just one measure of overall cardiovascular health, but I wanted to give a bit of good news: I suffered cardiac arrest and a later heart attack at the end of April (had previous LAD stents, so not my first rodeo). My EF was measured just after the 2 incidents in April at around 40 percent. I just had a stress echo and a ultrasound with contrast, and my EF was measured at 57% and 63% respectively. So, my heart seems to be largely intact!
Now, of course, my issues lie in my arteries, and that's a separate book to be written. But with cardiac rehab and meds (biso, atorvastatin etc) my heart seems to have recovered.