If it was growing well up till now, I think you'll be fine. If you planted it as a rhizome there's a bunch of new roots growing off of it and it's accumulated some reserves down in the crown. You'll most likely see some new vines sprout and take over for the annihilated ones. Being that the crown spent some of it's reserves getting the new shoots to grow, it'll most likely be set back a slight bit next Spring but you'll never know the difference. Good luck!