The survival rate of people dealing with bigeminy/PVC's who have structurally normal hearts is nearly 100%!!! I can't guaruntee that, but basically, if you've been checked out and your heart is structurally normal, then PVC's and bigeminy are NOT DANGEROUS (though they are totally scary--especially at first). Please come join us in the Heart Rhythm forum. There are hundreds of posts describing PVC's/bigeminy and the treatments, lifestyles, and thoughts of those of us who suffer from them.
I have had PVC's regularly since after my first child was born. He is now 71/2 years old!!! There were periods of time when I thought I was going to die and leave my baby alone to grow up without a mommy. But I'm still here. There are many on the heart rhythm forum who've had them for DECADES and are completely healthy still.
I know you are frightened, and I know you are looking for answers. You've come to the right place. Please hop over to the other forum and read the "Hello" Post at the top of the page first. I think you will find it comforting.
http://www.medhelp.org/forums/show/92
Take care