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Healthcare
and Lab
Diagnostic Newsletter
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CK-MB
Test
Also known as: CK MB, CPK
MB
Formally known as: Creatine
Kinase–MB
Cardiac
Markers:
Troponin
I/Troponin T
Test
- Cardiac
Troponins as
Markers of Myocardial Injury
Cardiac
Profile
Troponin I/CK-MB/
Myoglobin
Cardiac
Markers:
Myoglobin
Test
Common
Questions
Cardiac
Markers:
CK,
CPK
Test
Creatinine Kinase
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Cardiac
Markers:
LD,
LDH Test
Lactate Dehydrogenase
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Myocardial infarction
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Reference
test procedure
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Contact :
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info@thailabonline.com
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Cardiac Markers: Cardiac
Markers Update Troponin I / Troponin T
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Related tests: CK,
Myoglobin,
Troponin
Common Questions
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1. What does heart attack mean?
2. If I have chest pain, does that mean I am having a heart attack?
3. What are the other heart attack tests?
4. What if I’m not sure I’m having a heart attack?
1. What does heart attack mean?
Heart attack means that some of the muscle in your heart has died. A medical term for this is myocardial infarction (MI). Most commonly, a heart attack starts with a kind of heavy pressure or pain in the chest, often extending into the neck or left arm. You may have trouble catching your breath, or you may feel weak and break into a cold sweat.
A heart attack usually occurs because one of the blood vessels (called coronary arteries) that bring blood to your heart muscle is blocked. This usually happens when a blood clot forms in a blood vessel that is already partially blocked. The partial blockage, which happens gradually over many years, is usually caused by too much fat layered in the wall of the blood vessel (this is often called hardening of the arteries—the medical term for this is atherosclerosis).
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2. If I have chest pain, does that mean I am having a heart attack?
Many other problems can cause chest pain, and it is not always possible to tell just from the type of chest pain whether or not you are having a heart attack. Many people have chest pain from straining the muscles in their chest, and chest pain can occur with some lung problems. Chest pain can be a warning sign of hardening of the arteries of the heart (coronary artery disease or CAD). Chest pain that occurs during exercise, hard work, or at times of stress, lasts for a few minutes and goes away with rest is called angina. If the pain lasts longer than just a few minutes, especially if it occurs when you are resting, seek immediate medical attention.
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3. What are the other heart attack tests?
Doctors often use more than one test to determine if a person who has chest pain is having a heart attack. Troponin can pick up damage to heart muscles even when there is no other evidence of a heart attack. Myoglobin and creatine kinase do not usually rise in persons with heart injury unless a heart attack has occurred. Some doctors use the term “mild heart attack” if troponin is high but one or both of the other muscle proteins are not.
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4. What if I’m not sure I’m having a heart attack?
If you have prolonged chest pain, especially if it does not go away with rest— or if you have been told you have angina, and the drugs you were prescribed do not ease the pain—seek immediate medical attention. Many people who have had a heart attack die without ever having tried to call an ambulance or get to an emergency room.
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Why get tested?
To determine if you have had a heart
attack and whether certain clot-busting drugs are working
When to get tested?
If you have chest pain and your CK
levels are high
Sample required?
A blood sample drawn from a vein in the arm
The Test Sample
What is being tested?
CK–MB is one of three separate forms of the enzyme creatine kinase (CK). CK–MB is found mostly in heart muscle. It rises when there is any disease or damage to heart muscle cells.
How is the sample collected for testing?
A blood sample is taken by needle from the arm.
CK-MB
Test
How
is it used?
When
is it ordered?
What
does the test result mean?
Is
there anything else I should know?
CK–MB levels, along with total CK, are tested in persons
who have chest pain to diagnose whether they have had a heart
attack. Since a high total CK could indicate damage to
either the heart or other muscles, a high CK–MB suggests
that the damage was to heart muscle. If your doctor thinks
you have had a heart attack and gives you a
“clot-busting” drug (called a thrombolytic), CK–MB
can help your doctor tell if the drug worked. When the
clot is broken open, CK–MB tends to rise and fall
faster. By measuring CK–MB in blood several times, your
doctor can usually tell whether the drug has worked.
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CK-MB is usually ordered, along with total CK,
in persons with chest pain to determine whether the pain
is due to a heart
attack. It may also be ordered in a person with a high
CK to determine whether damage is to the heart or other
muscles.
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What
does the test result mean?
If the ratio of CK–MB to total CK (relative index) is
more than 2.5–3, the heart is the likely muscle damaged.
A high CK with a very low relative index suggests that
other muscles were damaged.
In most cases, test
results are reported as numerical values rather than as
"high" or "low", "positive"
or "negative", or "normal". In these
instances, it is necessary to know the reference range for
the particular test. However, reference ranges may vary by
the patient's age, sex, as well as the instrumentation or
kit used to perform the test. To learn more about
reference ranges, please see the article, Reference
Ranges and What They Mean. To learn the reference
range for your test, consult your doctor or laboratorian.
Is
there anything else I should know?
Severe injury to skeletal muscle can be significant enough
to raise CK–MB levels above normal, but such injury
doesn’t usually cause a high relative index. If your
doctor suspects injury to both heart muscle and skeletal
muscle, it may be hard to detect heart injury. Then your
doctor may need to order other tests (such as troponin).
Sometimes persons
who are having trouble breathing have to use their chest
muscles. Chest muscles have more CK–MB than other
muscles, which would raise the amount of CK–MB in the
blood.
Persons whose
kidneys have failed can also have high CK–MB levels
without having had a heart
attack. Rarely, chronic muscle disease, low thyroid
hormone levels, and alcohol abuse can increase CK–MB,
producing changes similar to those seen in a heart attack.
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top]
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| CK
- MB Kinetic Test kit |
| Method :KINETIC
UV TEST |
Stabilty :Dissolve
contents of enzyme reagent /R2 with the corresponding volume
of buffer /R1.
Gently swirl until completely dissolved.
DO NOT SHAKE!
This working reagent is stable for 15 days at + 2 to + 8C or 3
days at +20 to +25 C. |
| Storing Temperature : |
| Working Temperature :Temperature:
+25 / +30 / +37C |
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