13. Cardiac

Question 1

On ECG, what % of Acute Myocardial Infarctions show unequivocal evidence on MI?

Answer 1

50%

Question 2

On ECG, what % of Acute Myocardial Infarctions show nonspecific changes?

Answer 2

30%

Question 3

usual presentation of Acute Myocardial Infarctions include

Answer 3

symptoms and evidence of tissue damage

Question 4

patient with Acute Myocardial Infarction may exhibit

Answer 4

WBC with granulocytic leukocytosis within 12-24 hours of chest pain

Question 5

elevated for 3-4 weeks after Acute Myocardial Infarction

Answer 5

ESR

Question 6

elevate in first 12 hrs, peak at 24 hrs, and normal in a week

Answer 6

AST

Question 7

elevate in 24-48 hrs, peak in 48-72 hrs hrs, and normal in 5-10 days

Answer 7

LDH

Question 8

present in cardiac/skeletal myo, and brain

Answer 8

creatine kinase

Question 9

used to DDx cardiac from other sourses of AST or LDH

Answer 9

creatine kinase iso enzymes

Question 10

found in brain and lung

Answer 10

CK-BB (CK-1)

Question 11

hybrid found primarily in cardiac myo

elevates in 3-6 hours, peak at 24, and normal by 48

Answer 11

CK-MB (CK-2)

Question 12

primarily found in skeletal myo

Answer 12

CK-BM (CK-3)

Question 13

elevates in 4-6 hrs, behaves like CK-MB but stays elevated longer

Answer 13

tropinin (hscTNT)

Question 14

behaves like hscTNT but returns to range in 3-4 days

Answer 14

tropinin (hscTN1)

Question 15

hormone produced by heart that rises with increased cardiac workload and causes kidney to excrete Na

Answer 15

brain natiuretic peptide (BNP)