<prompt> The predominant isoenzyme of LDH in the cardiac muscle is?LDH 1LDH 2LDH 3LDH 5  <response>: In normal plasma LDH-2 is more in concentration than LDH 1.In myocardial infarction level of LDH 1 increases and this leads to altered ratio of LDH.It means LDH 1 LDH 2.This altered ratio of the LDH is known as flipped pattern. 