<prompt> The flipped pattern of LDH isoenzymes occur in -MyositisMyocardial infarctionGraves diseaseMyasthenia gravis  <response>: LDH-2 is usually the predominant form in the serum. An LDH-1 level higher than the LDH-2 level a flipped pattern suggests myocardial infarction damage to hea tissues releases hea LDH, which is rich in LDH-1, into the bloodstream. The use of this phenomenon to diagnose infarction has been largely superseded by the use of Troponin I or T measurement Ref: 