CK-MB to Total CK Ratio for Myocardial Injury

Calculate CK-MB fraction as a percentage of total CK. CK-MB/total CK above 6% suggests myocardial origin of CK elevation, as skeletal muscle CK-MB is typically below 2-3%. Useful when troponin is equivocal or to confirm cardiac vs. skeletal muscle source of CK elevation.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How to Use

Enter the values for the scenario you are assessing. Calculate CK-MB fraction as a percentage of total CK. CK-MB/total CK above 6% suggests myocardial origin of CK elevation, as skeletal muscle CK-MB is typically below 2-3%. Useful when troponin is equivocal or to confirm cardiac vs. skeletal muscle source of CK elevation. Use the ck-mb/ck ratio result to inform your calculation.

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Frequently Asked Questions