I went into the ER as recommended by the AARP nurse line weekend before last, and was diagnosed with bradycardia from Bystolic. My liver enzymes, which have always been normal--last tested June 29, 2011--were very high. The ER doctor did an EKG and didn't think it was an MI, but my primary care doctor does. Are very elevated liver enzymes a side effect of the drug Bystolic? Is the lover permanently damaged or will it recover?