Is LDH 243 high, normal or dangerous? What does Lactate dehydrogenase level 243 mean?

📅 Medical Review Date: September 1, 2025

Your LDH level of 243 is a High LDH level.

An LDH level of 243 U/L usually means tissue damage has occurred somewhere in the body. It suggests cell injury or destruction. High levels of LDH can cause fatigue, muscle pain, shortness of breath, dark urine, fever, and jaundice depending on which tissue is affected. This can be caused by heart attack, liver disease, kidney disease, muscle injury, or certain cancers. Further tests are often needed to identify the cause and guide appropriate treatment.

High LDH levels may indicate underlying health problems. The normal range is typically between 100 U/L and 190 U/L. If your levels are outside this range, it's important to speak with a healthcare provider. Consulting a doctor is recommended to determine the cause and appropriate next steps.

The normal LDH range for men is :100 - 190 U/L

Ideal values of LDH depending on age (male) :

Age	Ideal LDH value
<5 years	102.43
5-10 years	104.919
10-15 years	107.469
15-20 years	110.08
20-25 years	112.755
25-30 years	115.495
30-35 years	118.302
35-40 years	121.177
40-45 years	124.122
45-50 years	127.138
50-55 years	130.227
55-60 years	133.392
60-70 years	136.633
70-80 years	139.953
80-90 years	143.354
90-100 years	146.838
>100 years	150.406

*Ideal values are calculated based on our database of patient records

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1,51,150

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Some examples of conditions that increase or decrease LDH levels include:

• Acute kidney disease
• Acute liver disease
• Sepsis
• Infections such as infectious mononucleosis
• Pancreatitis

Normal range of LDH found among women :100-190 U/L

Ideal values of LDH depending on age (female) :

Age	Ideal LDH value
<5 years	102.503
5-10 years	105.069
10-15 years	107.699
15-20 years	110.395
20-25 years	113.158
25-30 years	115.99
30-35 years	118.893
35-40 years	121.869
40-45 years	124.919
45-50 years	128.046
50-55 years	131.251
55-60 years	134.536
60-70 years	137.903
70-80 years	141.355
80-90 years	144.893
90-100 years	148.52
>100 years	152.237

If you take a LDH blood test and the results are not in the normal range (100-190 U/L), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the LDH Test Is Done :

When your doctor orders a LDH test, it involves a straightforward blood draw to measure your LDH levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your LDH test results are usually available within a few hours.

Medical References

• MedlinePlus – Lactate Dehydrogenase (LDH) Test
• Cleveland Clinic – LDH (Lactate Dehydrogenase) Test: What It Is & Results
• MedlinePlus – LDH isoenzyme blood test