Epinephrine in local anesthetics does indeed produce hypokalemia and ECG changes.
Kubota
Y
Y
Toyoda
Y
Y
Kubota
H
H
Asada
A
A
D004562:Electrocardiography / Q000187:drug effects*; D004837:Epinephrine / Q000008:administration & dosage / Q000009:adverse effects*; D006801:Humans; D007008:Hypokalemia / Q000139:chemically induced*; D008012:Lidocaine / Q000008:administration & dosage*
D008012:Lidocaine; D004837:Epinephrine