Pre-Op testing shows an "Abnormal EKG"?!

surgery scheduled for Thursday! NS referred me to PCP to review EKG, & I suppose, to look me over. He needs to clear me for surgery tomorrow afternoon/refer to a cardiologist. Anybody else have this happen?! The NS nurse wasn’t that worked up about it-said it was probably nothing. But both my parents have had px.
Advice, please?!