<P> A variety of blood tests are available for analyzing cholesterol transport behavior, HDL, LDL, triglycerides, lipoprotein little a, homocysteine, C - reactive protein, blood sugar control: fasting, after eating or averages using glycosylated albumen or hemoglobin, myoglobin, creatine kinase, troponin, brain - type natriuretic peptide, etc. to assess the evolution of coronary artery disease and evidence of existing damage . A great many more physiologic markers related to atherosclerosis and heart function are used and being developed and evaluated in research . </P> <Table> Cardiology diagnostic tests <Tr> <Th> Test Name </Th> <Th> Lower / normal risk </Th> <Th> High risk </Th> <Th> Cost $US (approx) </Th> </Tr> <Tr> <Td> Total Cholesterol </Td> <Td> <200 mg / dL </Td> <Td>> 240 mg / dL </Td> </Tr> <Tr> <Td> LDL - C </Td> <Td> <100 mg / dL </Td> <Td>> 160 mg / dL </Td> <Td> $150 * </Td> </Tr> <Tr> <Td> HDL - C </Td> <Td>> 60 mg / dL </Td> <Td> <40 mg / dL </Td> </Tr> <Tr> <Td> Triglyceride </Td> <Td> <150 mg / dL </Td> <Td>> 200 mg / dL </Td> </Tr> <Tr> <Td> Blood Pressure </Td> <Td> <120 / 80 mmHg </Td> <Td>> 140 / 90 mmHg </Td> </Tr> <Tr> <Td> C - reactive protein </Td> <Td> <1 mg / L </Td> <Td>> 3 mg / L </Td> <Td> $20 </Td> </Tr> <Tr> <Td> Fibrinogen </Td> <Td> <300 mg / dL </Td> <Td>> 460 mg / dL </Td> <Td> $100 </Td> </Tr> <Tr> <Td> Homocysteine </Td> <Td> <10 μmol / L </Td> <Td>> 14 μmol / L </Td> <Td> $200 </Td> </Tr> <Tr> <Td> Fasting Insulin </Td> <Td> <15 μIU / mL </Td> <Td>> 25 μIU / mL </Td> <Td> $75 </Td> </Tr> <Tr> <Td> Ferritin </Td> <Td> male 12--300 ng / mL female 12--150 ng / mL </Td> <Td> </Td> <Td> $85 </Td> </Tr> <Tr> <Td> Lipoprotein (a) - Lp (a) </Td> <Td> <14 mg / dL </Td> <Td>> 19 mg / dL </Td> <Td> $75 </Td> </Tr> <Tr> <Td> Coronary calcium scan </Td> <Td> <100 </Td> <Td>> 300 </Td> <Td> $250--600 </Td> </Tr> </Table> <Tr> <Th> Test Name </Th> <Th> Lower / normal risk </Th> <Th> High risk </Th> <Th> Cost $US (approx) </Th> </Tr> <Tr> <Td> Total Cholesterol </Td> <Td> <200 mg / dL </Td> <Td>> 240 mg / dL </Td> </Tr>

Describe three tests used to assess the function of the circulatory system