Cardiac Biomarkers: Types, Significance, and
Clinical Use in Myocardial Injury Exam
UPDATED QUESTIONS AND CORRECT
ANSWERS
What are cardiac biomarkers? - CORRECT ANSWER Molecules released in the
setting of heart damage, stress, or dysfunction.
Which biomarkers indicate myocardial injury? - CORRECT ANSWER Creatine kinase
(CK), CK-MB, myoglobin, troponins.
What biomarkers are associated with myocardial ischemia? - CORRECT
ANSWER Ischemia-modified albumin (IMA), heart-type fatty acid-binding protein (H-
FABP).
What are the biomarkers for hemodynamic stress? - CORRECT ANSWER Natriuretic
peptides: atrial natriuretic peptide (ANP), N-terminal proBNP, B-type natriuretic peptide
(BNP).
What is the role of cardiac biomarkers in diagnosis? - CORRECT ANSWER They help
confirm myocardial injury/infarction (MI).
How do cardiac biomarkers assist in risk stratification? - CORRECT ANSWER They
determine the severity of conditions and predict patient outcomes.
What is the significance of troponins in myocardial injury? - CORRECT
ANSWER Troponins T and I are highly specific and sensitive for detecting MI.
What is the normal range for Troponin T? - CORRECT ANSWER Less than 0.1
ng/mL.
, What is the normal range for Troponin I? - CORRECT ANSWER Less than 0.04
ng/mL.
How quickly do troponins rise after myocardial injury? - CORRECT ANSWER They
rise within 3-6 hours.
What is the peak time for troponins after myocardial injury? - CORRECT
ANSWER 12-24 hours.
How long can troponins remain elevated after myocardial injury? - CORRECT
ANSWER Up to 2 weeks.
What is the role of CK-MB in diagnosing myocardial injury? - CORRECT
ANSWER CK-MB is slightly less specific than troponin but used for diagnosing MI.
What is the normal range for total CK in males? - CORRECT ANSWER 38-174 U/L.
What is the normal range for total CK in females? - CORRECT ANSWER 26-140 U/L.
What is myoglobin and its significance in myocardial injury? - CORRECT
ANSWER An oxygen-binding muscle protein released rapidly after injury; used to rule
out acute MI.
When does myoglobin typically rise after myocardial injury? - CORRECT
ANSWER Within 2-3 hours.
What are natriuretic peptides and their role? - CORRECT ANSWER Neuroendocrine
peptides that oppose the renin-angiotensin system, used to identify and stratify CHF patients.
What is the normal range for BNP? - CORRECT ANSWER Less than 100 pg/mL.
Clinical Use in Myocardial Injury Exam
UPDATED QUESTIONS AND CORRECT
ANSWERS
What are cardiac biomarkers? - CORRECT ANSWER Molecules released in the
setting of heart damage, stress, or dysfunction.
Which biomarkers indicate myocardial injury? - CORRECT ANSWER Creatine kinase
(CK), CK-MB, myoglobin, troponins.
What biomarkers are associated with myocardial ischemia? - CORRECT
ANSWER Ischemia-modified albumin (IMA), heart-type fatty acid-binding protein (H-
FABP).
What are the biomarkers for hemodynamic stress? - CORRECT ANSWER Natriuretic
peptides: atrial natriuretic peptide (ANP), N-terminal proBNP, B-type natriuretic peptide
(BNP).
What is the role of cardiac biomarkers in diagnosis? - CORRECT ANSWER They help
confirm myocardial injury/infarction (MI).
How do cardiac biomarkers assist in risk stratification? - CORRECT ANSWER They
determine the severity of conditions and predict patient outcomes.
What is the significance of troponins in myocardial injury? - CORRECT
ANSWER Troponins T and I are highly specific and sensitive for detecting MI.
What is the normal range for Troponin T? - CORRECT ANSWER Less than 0.1
ng/mL.
, What is the normal range for Troponin I? - CORRECT ANSWER Less than 0.04
ng/mL.
How quickly do troponins rise after myocardial injury? - CORRECT ANSWER They
rise within 3-6 hours.
What is the peak time for troponins after myocardial injury? - CORRECT
ANSWER 12-24 hours.
How long can troponins remain elevated after myocardial injury? - CORRECT
ANSWER Up to 2 weeks.
What is the role of CK-MB in diagnosing myocardial injury? - CORRECT
ANSWER CK-MB is slightly less specific than troponin but used for diagnosing MI.
What is the normal range for total CK in males? - CORRECT ANSWER 38-174 U/L.
What is the normal range for total CK in females? - CORRECT ANSWER 26-140 U/L.
What is myoglobin and its significance in myocardial injury? - CORRECT
ANSWER An oxygen-binding muscle protein released rapidly after injury; used to rule
out acute MI.
When does myoglobin typically rise after myocardial injury? - CORRECT
ANSWER Within 2-3 hours.
What are natriuretic peptides and their role? - CORRECT ANSWER Neuroendocrine
peptides that oppose the renin-angiotensin system, used to identify and stratify CHF patients.
What is the normal range for BNP? - CORRECT ANSWER Less than 100 pg/mL.
