CK (CPK) Isoenzyme Electrophoresis Test
Short Name: CK Isoenzyme Electrophoresis
Also known as: CPK Isoenzyme Test, Creatine Kinase Isoenzyme Electrophoresis, CK Isoenzyme Separation Test, CPK Isoenzyme Fractionation
CK (CPK) Isoenzyme Electrophoresis Test test available at DNA Labs India for ₹11,000. Uses Agarose Gel Electrophoresis on Serum samples. Results in Same-day reporting for samples received by 9:00 AM. Results available within 24 hours otherwise.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Ramarao Paidisetty
Consultant Biochemist · Reg: 21504
Last reviewed: September 7, 2026
Overview
The CK (CPK) Isoenzyme Electrophoresis Test is performed to differentiate the tissue origin of elevated creatine kinase levels in the blood. It helps clinicians distinguish between cardiac muscle damage (such as myocardial infarction), skeletal muscle injury (such as rhabdomyolysis, muscular dystrophy, or myositis), and rarely, brain tissue damage. This distinction is critical for guiding appropriate treatment, avoiding unnecessary cardiac interventions when the source is skeletal muscle, and ensuring timely cardiac care when the heart is the source. The test includes total CK measurement alongside isoenzyme fractionation for a complete diagnostic picture.
- Test Code
- 326
- CPT Code
- 82552
- ICD Code
- M79.1
- Price
- ₹11,000
- Sample Type
- Serum
- Result Time
- Same-day reporting for samples received by 9:00 AM. Results available within 24 hours otherwise.
- Fasting Required
- No
- Method
- Agarose Gel Electrophoresis
Sample Collection
No special preparation or fasting is required. Inform your doctor about all medications, recent physical activity, injections, or surgical procedures, as these may affect CK isoenzyme levels. Avoid strenuous exercise for 24–48 hours before sample collection if clinically feasible.
Method: Venipuncture
Laboratory Analysis
A healthcare professional will collect approximately 2 mL of blood from a vein in your arm using standard venipuncture technique. The blood is drawn into a serum separator tube (SST). The procedure typically takes less than 5 minutes and may cause minimal discomfort.
Report Delivery
Apply pressure to the puncture site with a cotton ball or bandage for a few minutes. Mild bruising may occur. You can resume normal activities immediately. The sample is processed using agarose gel electrophoresis to separate and quantify individual CK isoenzymes.
Timeline: Same-day reporting for samples received by 9:00 AM. Results available within 24 hours otherwise.
Patient Instructions
About This Test
Who Should Get This Test
The CK (CPK) Isoenzyme Electrophoresis Test is performed to differentiate the tissue origin of elevated creatine kinase levels in the blood. It helps clinicians distinguish between cardiac muscle damage (such as myocardial infarction), skeletal muscle injury (such as rhabdomyolysis, muscular dystrophy, or myositis), and rarely, brain tissue damage. This distinction is critical for guiding appropriate treatment, avoiding unnecessary cardiac interventions when the source is skeletal muscle, and ensuring timely cardiac care when the heart is the source. The test includes total CK measurement alongside isoenzyme fractionation for a complete diagnostic picture.
How to Prepare
- Provide 2 mL (minimum 1.5 mL) of serum from one SST tube
- Hemolyzed specimens are NOT acceptable and will be rejected
- Ship the sample refrigerated (2–8°C) or frozen (≤ -20°C)
- Refrigerated samples are stable for 72 hours; frozen samples are stable for 1 week
- Avoid hemolysis by proper venipuncture technique and gentle mixing of the sample
- Clearly label the sample with patient details and date/time of collection
Doctor's Notes
Reviewed by Dr Ramarao Paidisetty — MBBS, MD (Biochemistry) · Reg. No. 21504
"CK isoenzyme electrophoresis remains a valuable tool for differentiating the tissue source of elevated creatine kinase. While troponin assays are now the gold standard for acute myocardial infarction, CK-MB fractionation via electrophoresis helps identify skeletal muscle disease, rhabdomyolysis, and mixed muscle injury patterns that can confound cardiac-only biomarkers. I recommend this test when there is discordance between clinical presentation and troponin levels, or when a non-cardiac source of CK elevation is suspected."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Hemolyzed specimens
- Insufficient sample volume (less than 1.5 mL)
- Specimen stored at room temperature beyond acceptable limits
- Improperly labeled or unlabeled samples
- Clotted blood in the collection tube
Understanding Your Results
Suggests cardiac muscle injury. May indicate acute myocardial infarction, myocarditis, cardiac surgery, or cardiac contusion. Clinical correlation with symptoms, ECG, and troponin levels is recommended.
High
Suggests skeletal muscle damage. May indicate rhabdomyolysis, muscular dystrophy, polymyositis, dermatomyositis, strenuous exercise, IM injections, or statin-induced myopathy.
High
May indicate brain tissue damage (stroke, traumatic brain injury), certain malignancies (prostate, breast, GI cancers), or severe hypoxic shock. Macro-CK type 2 may also mimic CK-BB.
High
May indicate combined cardiac and skeletal muscle injury, as seen in polymyositis with cardiac involvement, severe trauma, or electrical injury.
High
CK isoenzyme levels within reference ranges suggest no significant acute muscle or cardiac injury at the time of sample collection.
Normal
Consult your doctor if your CK isoenzyme electrophoresis results show elevated CK-MB (suggesting possible cardiac injury), elevated CK-MM with symptoms of muscle weakness or dark urine (suggesting rhabdomyolysis), or detectable CK-BB. Any abnormal result should be evaluated in conjunction with your clinical symptoms, medical history, and additional diagnostic tests such as ECG, troponin, or imaging studies.
Limitations
- ⚠CK isoenzyme electrophoresis has lower sensitivity than troponin assays for detecting minor myocardial injury
- ⚠Macro-CK variants (macro-CK type 1 and type 2) can cause false-positive CK-BB or CK-MB bands
- ⚠Results may be affected by sample hemolysis, improper storage, or delayed processing
- ⚠This test does not replace cardiac troponin for acute coronary syndrome diagnosis in current clinical guidelines
Risks & Considerations
- ●Minor bruising or pain at the blood draw site
- ●Rare risk of infection at the puncture site
- ●Fainting or dizziness in sensitive individuals during venipuncture
Interfering Factors
- ●Hemolyzed blood samples produce falsely elevated CK-BB and CK-MB levels
- ●Strenuous physical exercise within 24–48 hours before testing can elevate CK-MM
- ●Intramuscular injections can cause local CK-MM elevation
- ●Certain medications including statins, fibrates, and antipsychotics may elevate total CK
- ●Recent cardiac catheterization or surgery can transiently raise CK-MB
Compare With Similar Tests
| Test | CK (CPK) Isoenzyme Electrophoresis Test | Cardiac Troponin I/T | Total CK (Creatine Kinase) | CK-MB Mass Assay |
|---|---|---|---|---|
| Comparison | CK (CPK) Isoenzyme Electrophoresis Test | Troponin is more sensitive and specific for myocardial injury than CK-MB. However, CK isoenzyme electrophoresis provides information about skeletal muscle contribution and is useful when troponin is elevated but a non-cardiac source is suspected. | Total CK measures all CK activity without distinguishing tissue source. CK isoenzyme electrophoresis fractionates CK into CK-MM, CK-MB, and CK-BB to identify the origin of enzyme elevation. | CK-MB mass assay uses immunoassay for rapid CK-MB quantification. CK isoenzyme electrophoresis provides a visual separation of all isoenzymes and can detect abnormal macro-CK variants that mass assays may miss. |
Frequently Asked Questions
What is the CK (CPK) Isoenzyme Electrophoresis Test?
Why is the CK isoenzyme electrophoresis test ordered?
What sample is required for the CK isoenzyme electrophoresis test?
Is fasting required before the CK isoenzyme electrophoresis test?
How long does it take to get the results of the CK isoenzyme electrophoresis test?
What do elevated CK-MB levels indicate?
What is the cost of the CK (CPK) Isoenzyme Electrophoresis Test in India?
Is home sample collection available for this test?
What are the three CK isoenzymes measured in this test?
How is the CK isoenzyme electrophoresis test different from a total CK test?
What conditions can the CK isoenzyme electrophoresis test help diagnose?
Are there any risks associated with the CK isoenzyme electrophoresis test?
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