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Triiodothyronine Reverse (RT3)

The measurement of reverse triiodothyronine in serum is used in the diagnosis of Euthyroid Syndrome or Disease Euthyroid Syndrome.

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Reverse Τ3 or reverse triiodothyronine (RT3) is an isomer of triiodothyronine (T3). It is derived from thyroxine and is considered to be an inactive form of the hormone. Reverse triiodothyronine increases in conditions such as Euthyroid Syndrome. Euthyroid Syndrome or Disease Euthyroid Syndrome or Low T3 and T4 Syndrome is a state of adaptation or dysfunction of negative feedback control of the thyroid, where T3 or T4 levels are at abnormal levels but the thyroid is functioning normally. This condition often occurs in hunger or fasting, in pneumonia, sepsis, trauma, cardiopulmonary bypass, malignancy, stress, heart failure, hypothermia, myocardial infarction, chronic renal failure, liver cirrhosis, and cirrhosis.

Reverse triiodothyronine is high in patients receiving medications such as propylthiouracil, propranolol, amiodarone, dexamethasone, and halothane anesthetic.




Important Note

Laboratory test results are the most important parameter for the diagnosis and monitoring of all pathological conditions. 70%-80% of diagnostic decisions are based on laboratory tests. Correct interpretation of laboratory results allows a doctor to distinguish "healthy" from "diseased".

Laboratory test results should not be interpreted from the numerical result of a single analysis. Test results should be interpreted in relation to each individual case and family history, clinical findings and the results of other laboratory tests and information. Your personal physician should explain the importance of your test results.

At Diagnostiki Athinon we answer any questions you may have about the test you perform in our laboratory and we contact your doctor to get the best possible medical care.

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