What causes high APTT and low Lipoprotein a?

High APTT and low Lipoprotein a can be caused by many reasons.

If your APTT is in between 22 seconds and 35 seconds and your Lipoprotein a is in between 1 mg/dl and 30 mg/dl then you need not worry as these are the normal ranges for APTT and Lipoprotein a respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Some examples of conditions that can increase or decrease APTT levels include:

• Liver disease
• Vitamin K abnormality
• Decreased or defective factor I (fibrinogen), II (prothrombin), V or X
• Hemophilia A and hemophilia B
• Willebrand disease

Normal range of APTT : 22 - 35 seconds

Ideal values of APTT depending on age :

Age	Ideal APTT value
<5 years	22.387
5-10 years	22.781
10-15 years	23.182
15-20 years	23.59
20-25 years	24.005
25-30 years	24.428
30-35 years	24.858
35-40 years	25.296
40-45 years	25.741
45-50 years	26.194
50-55 years	26.655
55-60 years	27.124
60-70 years	27.602
70-80 years	28.088
80-90 years	28.583
90-100 years	29.086
>100 years	29.598

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

Normal range of Lipoprotein a : 1 - 30 mg/dl

Ideal values of Lipoprotein a depending on age :

Age	Ideal Lipoprotein a value
<5 years	1.018
5-10 years	1.036
10-15 years	1.054
15-20 years	1.073
20-25 years	1.092
25-30 years	1.111
30-35 years	1.131
35-40 years	1.151
40-45 years	1.171
45-50 years	1.192
50-55 years	1.213
55-60 years	1.234
60-70 years	1.256
70-80 years	1.278
80-90 years	1.301
90-100 years	1.324
>100 years	1.347

High APTT and low Lipoprotein a can be caused by a lot of reasons. If you take APTT and Lipoprotein a blood tests and the results are higher than 35 seconds for APTT and lower than 1 mg/dl for Lipoprotein a, your physician may recommend more tests to figure out the problem. You might also get these tests if your physician thinks you have some other disease.

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How the APTT and Lipoprotein a Tests Are Done :

If your doctor wants APTT and Lipoprotein a tests on you, you may need to go through these tests. During the APTT and Lipoprotein a blood tests, a pathologist will put a needle into your veins and take out a small quantity of blood. A pathologist is a physician in the medical field who thoroughly studies the causes and effects of disease. Within a few hours you will get your APTT and Lipoprotein a Test reports by your pathologist.

Medical References

• WebMD – Activated Partial Thromboplastin Time (APTT) Test
• Cleveland Clinic – Partial Thromboplastin Time (PTT) Test
• NIH – Solutions to Establishing and Verifying Normal Reference Intervals and Assessing APTT Reagents