Husband just had lvad fitted

My husband has recently been given a lvad . He has suffered with cardiomyopathy for a number of years but this last year he has been going down hill. So the specialist decided to fit a lvad as he couldn't wait for a heart transplant. Since his operation he has been having major problems with fast heart rates it's now over 3weeks and he still have problems. It's been a very stressful time for both of us .