I have this question from a case history. for question ii) how do i know what organ system is involved?

I have this question from a case history. for question ii) how do i know what organ system is involved?

Patient presents with the following test results in the ED.

Tests

Results

LD - Elevated

CK - Normal

CKMB - Normal

TropI - Normal

Please answer the following questions:

i) Is the test data indicative of a Myocardial Infarction? Please explain your answer.

ii) What is the likely organ system involved? Please explain your answer.

iii) Can you suggest other tests to aid in the interpretation of the above test result profile?