The EKG can show non specific ST T wave changes and T wave inversions.  Despite the very high level of CK, the criteria for MI requires a 5% MB index (may vary by assay and gender).
Rhabdomyolysis electrocardiogram
Toxic megacolon electrocardiogram
Myxedema coma electrocardiogram
Toxic Adenoma electrocardiogram
Brugada syndrome electrocardiogram
Haff disease electrocardiogram
Adams-Stokes syndrome electrocardiogram
Cyanosis electrocardiogram