What is the earliest cardiac marker that can be detected? - ANSWERMyoglobin (1-4h post MI)
What cardiac marker can be detected for the longest period of time post MI? - ANSWERTroponin (may be present up to 10-14d post MI)
What is a normal myoglobin level? - ANSWER<90mcg
Myoglobin is cle...
What is the earliest cardiac marker that can be detected? - ANSWERMyoglobin (1-4h post MI)
What cardiac marker can be detected for the longest period of time post MI? - ANSWERTroponin
(may be present up to 10-14d post MI)
What is a normal myoglobin level? - ANSWER<90mcg
Myoglobin is cleared from the body via urine within how many hours post MI? - ANSWER24h
Eliza is a 66yr old patient who presents to the ER with chest pain that has gotten progressively worse
over the past 12 hours. What 2 cardiac markers may be at their peak? - ANSWERMyoglobin (would
be at the end of its peak, usually between 4-12h, so may be at peak or may have peaked earlier)
CK-MB (peaks between 12-24h, probably just reaching the beginning of its peak)
What CPK value would be concerning for Ms. Eliza?
a) 45
b) 70
c) 125
d) 150 - ANSWERd) 150
Normal CPK for females:
30-135
For Eliza, when would these two cardiac markers be cleared from her body/return to baseline? -
ANSWERMyoglobin-cleared within 24h in urine. So, 12 h from her ER presentation should be cleared.
, CPK returns to baseline in 48-72h, so it will stay elevated over the next 2-3 days in Eliza.
Sam is an 82yr old patient presenting to the ER with a CC of progressive fatigue and dyspnea over the
past 3 days. PE reveals 3+ pitting edema at the ankles, JVD, and bibasilar pulmonary rales. What
cardiac marker do you expect to be abnormal in this patient? - ANSWERBNP
Sam has HF, presenting to ER with possible decompensation/fluid overload. His BNP is likely to be
over 100 pg/ml.
Michael is a 55year old M presenting to the ER with 3 hours of chest pain that started while he was
mowing he lawn in 90 degree weather. What cardiac markers may be detected right now, if any? -
ANSWERMyoglobin (present w/in 1-4hrs)
HsCRP (within 2 hr)
Troponin (within 3 hours)
CPK (within 4-6h), CK-MB in 3-6 h post infarction
Michael's Lab Results:
Myoglobin 200
Troponin 99% of upper reference
CPK 250
HsCRP 3.0
What are he normal values for these markers in a male patient? - ANSWERMyoglobin: <90
Troponin: 99% of upper ref
CPK: male 55-170
HSCRP: <1 preferable, >2 concerning, 3+ high risk
How long does it take for troponin levels to peak d/t MI? - ANSWER2 days
How long does it take for troponin to be detectable in setting of MI? - ANSWER3h
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