My mother had a heart attack on friday. can that cause an elevated creatinine level? she also went into dka, could that cause it?

No surprise: Not knowing what her creatinine is at usual baseline, years of diabetes can damage kidneys so this could be the result of her diabetes. She is very ill. Without knowing details, poor blood circulation because of heart attack and DKA could cause kidney damage that can sometimes improve, tho i don't know your mom's case. Dehydration cause could improve with hydration. Hope she quickly recovers.

Renal injury: Creatinine can rise with DKA and dehydration as well as being related to underlying diabetic kidney disease. Heart attacks don't typically cause the creatinine to rise unless there is shock associated with it. If a cardiac cath was performed to treat her heart attack, the dye used can cause elevated ceratinine especially in diabetics.