Question
The physician requests that the cardiac biomarkers be tested over time. Which of the following is the expected pattern that may be present in Helen’s samples?
Both cardiac troponin I and creatine phosphokinase myocardial band peak within 30 minutes of myocardial infarction.
Cardiac troponin I and creatine phosphokinase myocardial band will present with an inverse relationship. As one factor elevates, the other factor decreases.
Cardiac troponin I elevates within the first 4 to 8 hours after onset of chest pain.
Cardiac biomarkers return to baseline within hours of the onset of chest p
Both cardiac troponin I and creatine phosphokinase myocardial band peak within 30 minutes of myocardial infarction.
Cardiac troponin I and creatine phosphokinase myocardial band will present with an inverse relationship. As one factor elevates, the other factor decreases.
Cardiac troponin I elevates within the first 4 to 8 hours after onset of chest pain.
Cardiac biomarkers return to baseline within hours of the onset of chest p
Answers
GPT-4o mini
In the context of myocardial infarction (MI), the expected pattern for cardiac biomarkers is as follows:
- **Cardiac troponin I elevates within the first 4 to 8 hours after onset of chest pain.**
Troponin levels generally rise within this time frame and can remain elevated for days to weeks, indicating ongoing myocardial injury. In contrast, creatine phosphokinase myocardial band (CK-MB) levels typically rise within 4 to 6 hours after myocardial injury and peak around 24 hours, but they begin to return to baseline within 2 to 3 days.
So, the correct statement regarding the expected pattern for Helen’s samples would be:
**Cardiac troponin I elevates within the first 4 to 8 hours after onset of chest pain.**
The other options presented either provide incorrect timing or relationships regarding these biomarkers.
- **Cardiac troponin I elevates within the first 4 to 8 hours after onset of chest pain.**
Troponin levels generally rise within this time frame and can remain elevated for days to weeks, indicating ongoing myocardial injury. In contrast, creatine phosphokinase myocardial band (CK-MB) levels typically rise within 4 to 6 hours after myocardial injury and peak around 24 hours, but they begin to return to baseline within 2 to 3 days.
So, the correct statement regarding the expected pattern for Helen’s samples would be:
**Cardiac troponin I elevates within the first 4 to 8 hours after onset of chest pain.**
The other options presented either provide incorrect timing or relationships regarding these biomarkers.