Re: What does 25% pumping rate mean?
First - I'm no expert, but I believe the RN was referring to your ejection fraction - or the fraction of blood pumped out of your ventricle with each heart beat.
A normal EF should be well above 50%. A 25% reading is very low and means your heart is not working properly.
Is it a death sentence? I don't know. There are ways to improve your EF, which I'm sure you're discussing with your doctor. It certainly isn't good news at all, though I have heard of EFs far worse than yours.