Cardiac Biomarkers Quiz

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Questions and Answers

What is the characteristic pattern of rise and fall seen in cardiac biomarkers?

  • Linear increase
  • Sudden spike followed by gradual decline (correct)
  • Constant level
  • Exponential decrease

Which of the following is NOT a common cardiac biomarker?

  • B-type natriuretic peptide (BNP)
  • Myoglobin
  • Troponin I
  • Hemoglobin A1c (correct)

What is the most common test used to understand the pathogenesis in human diseases?

  • Blood sample measurements
  • Electrocardiogram (ECG)
  • Echocardiogram
  • Histopathology examination (correct)

Which condition is NOT diagnosed using cardiac function tests?

<p>Atherosclerosis (B)</p> Signup and view all the answers

What is the primary purpose of using cardiac biomarkers?

<p>Evaluate myocardial injury (D)</p> Signup and view all the answers

Which test is NOT used in the diagnosis of heart conditions?

<p>Complete blood count (CBC) (D)</p> Signup and view all the answers

Which enzyme is more concentrated in the heart muscle and is more likely to indicate heart damage?

<p>Creatine kinase-MB (CK-MB) (D)</p> Signup and view all the answers

What is the role of phosphocreatine in cardiac tissue?

<p>It provides a stable release of energy (C)</p> Signup and view all the answers

Which enzyme is determined by immunoassay and is more likely to indicate heart damage?

<p>Creatine kinase (CK) (A)</p> Signup and view all the answers

Which cardiac biomarker is good for detecting re-infarction?

<p>Creatine kinase-MB (CK-MB) (C)</p> Signup and view all the answers

What happens to the levels of Creatine kinase (CK) after a myocardial infarction?

<p>They peak within 6 hours and return to normal within 2 days (B)</p> Signup and view all the answers

Which enzyme is useful as a marker of tissue injury?

<p>Creatine kinase (CK) (C)</p> Signup and view all the answers

What does prolonged ischemia lead to?

<p>Cell death and necrosis (B)</p> Signup and view all the answers

Which enzyme is increased in over 90% of myocardial infarction cases within 4-6 hours after onset?

<p>Creatine kinase (CK) (B)</p> Signup and view all the answers

What are the ideal characteristics of a cardiac biomarker according to the text?

<p>Absolute cardiac specificity, specific for irreversible injury, early release, high tissue sensitivity (C)</p> Signup and view all the answers

Which condition can also cause elevated levels of most cardiac biomarkers?

<p>Kidney disease (D)</p> Signup and view all the answers

Cardiac biomarkers are substances released into the bloodstream from damaged or stressed heart muscle. (True/False)?

<p>True (A)</p> Signup and view all the answers

Diagnostic accuracy of serum markers of cardiac injury are altered in patients with renal failure. (True/False)?

<p>True (A)</p> Signup and view all the answers

B-type natriuretic peptide (BNP) is not a common cardiac biomarker. (True/False)?

<p>False (B)</p> Signup and view all the answers

Cardiac function tests are used to help diagnose and monitor all types of heart conditions. (True/False)?

<p>False (B)</p> Signup and view all the answers

Myocarditis is a condition that can be diagnosed using cardiac function tests. (True/False)?

<p>False (B)</p> Signup and view all the answers

The primary purpose of using cardiac biomarkers is to evaluate myocardial injury. (True/False)?

<p>True (A)</p> Signup and view all the answers

Acute myocardial infarction results from a reduction of coronary blood flow that leads to an insufficiency of oxygen supply to myocardial tissue.

<p>True (A)</p> Signup and view all the answers

Myocardial cell death and necrosis occur when myocardial ischemia is prolonged and reversible.

<p>False (B)</p> Signup and view all the answers

Anaerobic glycolysis is decreased in myocardial muscles with low oxygen supply.

<p>False (B)</p> Signup and view all the answers

Lysosomal enzymes are activated during prolonged and irreversible ischemia in the myocardium.

<p>True (A)</p> Signup and view all the answers

Creatine kinase (CK) is an enzyme found only in the heart muscle and not in skeletal muscle.

<p>False (B)</p> Signup and view all the answers

CK-MB is more concentrated in skeletal muscle than in heart muscle.

<p>False (B)</p> Signup and view all the answers

CK-MB or total CK provides additional evidence supporting the diagnosis of acute myocardial infarction.

<p>True (A)</p> Signup and view all the answers

Creatine kinase begins to rise 24 hours after myocardial infarction and returns to normal within 2 days.

<p>False (B)</p> Signup and view all the answers

Phosphocreatine serves as an energy reserve in cardiac tissue as well as other tissues.

<p>True (A)</p> Signup and view all the answers

Elevated levels of most cardiac biomarkers are only caused by heart conditions such as myocardial infarction.

<p>False (B)</p> Signup and view all the answers

Flashcards

Cardiac Biomarker Pattern

A characteristic pattern seen in cardiac biomarkers, where the levels rise suddenly and then decline gradually over time.

Cardiac Biomarker Test

A blood test that measures the levels of specific proteins released from damaged heart muscle.

Troponin

A protein found in heart muscle that is released into the bloodstream when the heart is damaged.

Brain Natriuretic Peptide (BNP)

A protein released from heart muscle when the heart is stretched or under pressure.

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Cardiac Function Tests

A group of tests used to assess the function of the heart, such as its pumping ability and electrical activity.

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Histopathology Examination

A process that examines tissue under a microscope to diagnose diseases.

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Creatine Kinase-MB (CK-MB)

An enzyme that is more concentrated in heart muscle and is a good indicator of heart damage.

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Phosphocreatine

A substance that provides a stable release of energy in cardiac tissue.

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Creatine Kinase (CK)

A type of enzyme that is increased in the blood after a heart attack.

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Myocardial Cell Death

The process of a heart muscle cell dying due to lack of oxygen.

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Myocardial Ischemia

A condition where there is a lack of oxygen supply to the heart muscle.

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Myocarditis

A condition in which the heart is inflamed.

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Coronary Artery Disease

A condition in which the arteries that supply blood to the heart become narrowed or blocked.

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Heart Failure

A condition in which the heart muscle is weakened and unable to pump blood effectively.

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Re-infarction

The process of a heart attack that is occurring again.

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Ideal Cardiac Biomarker Characteristics

The ideal characteristics of a cardiac biomarker.

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Kidney Disease

A condition that can also cause elevated levels of most cardiac biomarkers.

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Cardiac Biomarker Release

True or False: Cardiac biomarkers are substances released into the bloodstream from damaged or stressed heart muscle.

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Renal Failure and Cardiac Biomarkers

True or False: Diagnostic accuracy of serum markers of cardiac injury are altered in patients with renal failure.

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BNP as a Biomarker

True or False: B-type natriuretic peptide (BNP) is not a common cardiac biomarker.

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Cardiac Function Tests Scope

True or False: Cardiac function tests are used to help diagnose and monitor all types of heart conditions.

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Myocarditis Diagnosis

True or False: Myocarditis is a condition that can be diagnosed using cardiac function tests.

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Primary Purpose of Cardiac Biomarkers

True or False: The primary purpose of using cardiac biomarkers is to evaluate myocardial injury.

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Myocardial Infarction Cause

True or False: Acute myocardial infarction results from a reduction of coronary blood flow that leads to an insufficiency of oxygen supply to myocardial tissue.

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Myocardial Ischemia and Cell Death

True or False: Myocardial cell death and necrosis occur when myocardial ischemia is prolonged and reversible.

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Anaerobic Glycolysis in Ischemia

True or False: Anaerobic glycolysis is decreased in myocardial muscles with low oxygen supply.

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Lysosomal Enzyme Activation

True or False: Lysosomal enzymes are activated during prolonged and irreversible ischemia in the myocardium.

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CK Location

True or False: Creatine kinase (CK) is an enzyme found only in the heart muscle and not in skeletal muscle.

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CK-MB Concentration

True or False: CK-MB is more concentrated in skeletal muscle than in heart muscle.

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CK-MB and MI Diagnosis

True or False: CK-MB or total CK provides additional evidence supporting the diagnosis of acute myocardial infarction.

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CK Rise Time

True or False: Creatine kinase begins to rise 24 hours after myocardial infarction and returns to normal within 2 days.

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Phosphocreatine Function

True or False: Phosphocreatine serves as an energy reserve in cardiac tissue as well as other tissues.

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Biomarker Specificity

True or False: Elevated levels of most cardiac biomarkers are only caused by heart conditions such as myocardial infarction.

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Study Notes

Cardiac Biomarkers

  • Characteristic pattern of rise and fall seen in cardiac biomarkers: increase after myocardial infarction, then decrease
  • Common cardiac biomarkers: NOT B-type natriuretic peptide (BNP)
  • Most common test used to understand pathogenesis in human diseases: NOT specified
  • Condition NOT diagnosed using cardiac function tests: Myocarditis
  • Primary purpose of using cardiac biomarkers: to evaluate myocardial injury
  • Test NOT used in the diagnosis of heart conditions: NOT specified

Enzymes and Markers

  • Enzyme more concentrated in heart muscle and indicative of heart damage: Creatine kinase (CK)
  • Role of phosphocreatine in cardiac tissue: serves as an energy reserve
  • Enzyme determined by immunoassay and indicative of heart damage: CK-MB
  • Cardiac biomarker good for detecting re-infarction: CK-MB
  • Effect of myocardial infarction on Creatine kinase (CK) levels: increase, then decrease
  • Enzyme useful as a marker of tissue injury: Creatine kinase (CK)
  • Prolonged ischemia leads to: myocardial cell death and necrosis

Ideal Characteristics of Cardiac Biomarkers

  • Ideal characteristics of a cardiac biomarker: NOT specified

Other Cardiac Conditions

  • Condition that can also cause elevated levels of most cardiac biomarkers: Renal failure
  • True/False statements:
    • Cardiac biomarkers are substances released into the bloodstream from damaged or stressed heart muscle: TRUE
    • Diagnostic accuracy of serum markers of cardiac injury are altered in patients with renal failure: TRUE
    • B-type natriuretic peptide (BNP) is not a common cardiac biomarker: FALSE
    • Cardiac function tests are used to help diagnose and monitor all types of heart conditions: FALSE
    • Myocarditis is a condition that can be diagnosed using cardiac function tests: FALSE
    • The primary purpose of using cardiac biomarkers is to evaluate myocardial injury: TRUE

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