Myocardial infarction

Question 1

transmural infarction

Answer 1

necrosis occurs in full thickness of myocardium wall

-ST elevation myocardial infarction (STEMI)

Question 2

non-transmural infarction

Answer 2

“subendocardial infarct”
vessel becomes reperfused or clot is lysed before full thickness necrosis can occur
- non-ST elevation myocardial infarction (nonSTEMI)

Question 3

multifocal microinfarction

Answer 3

occurs when small microvessels are occluded

Question 4

Infarct in LAD

Answer 4

anterior wall of L ventricle near apex

Question 5

Infarct in RCA

Answer 5

• inferior posterior wall of L ventricle

- inferior posterior wall of R ventricle

Question 6

Infarct in Circumflex

Answer 6

Lateral portion of L ventricle, not at apex

Question 7

Cardiac specific troponin protein

Answer 7

released after myocardial damage

• elevated after 3-12 hrs
• peak at 24 hrs
• back to normal after days

Question 8

Creatinine Kinase MB

Answer 8

MB is sensitive but not specific to cardiac muscle damage

• elevated after 3-12 hrs
• peak at 24 hrs
• back to normal in 48 hrs

Question 9

Familial Hypercholesterolemia

Answer 9

Autosomal Dominant inheritance!

- increased total cholesterol and LDL