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Endocrinologists who specialize in thryoid patients know not to treat patients based only on lab values. A high TSH and normal TT3 and TT4 may indicate that there are not enough free hormones available. A FreeT3 and FreeT4 will better tell the story because inactive hormone will not be included in the results. High TSH and normal FT3 and FT4 may indicate either that your 'normal' falls outside the normal range, or that your pituitary is trying to turn your thyroid on and it is not consistently or reliably responding. It may be rollercoastering. TSH is a test that gives the average of thyroid production over several weeks. FT3 and FT4 or TT3 and TT4 tells you how much hormone is there today. If FT3 and FT4 are low one week, and high the next, the TSH results will reflect the middle/average of the two. These patients usually (tho not always) have autoimmune Hashimoto's Thyroiditis or are not eating properly.
Treatment: Some doctors choose Block and Replace therapy for these conditions. Others try to raise FT3 and FT4 levels until the patient is comfortable and TSH values seem more normal.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoHigh T3 and T4 with low TSH is indicative that the thyroid gland is working in overdrive. TSH is secreted by the pituitary gland and stimulates the thyroid gland to secrete T4 and T3. T4 and T3 exert a negative feedback on the pituitary gland to stop secreting TSH, ie there is a negative feedback loop. this is a protective mechanism in which the thyroid gland is not overdrimulated by TSH.
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How are T3 T4 and TSH related?
TSH is the hormone produced by the pituitary gland that tells the thyroid to produce the thyroid hormones T4 and T3.
Can you not have hypothyroidism even though you have a high TSH level?
Hi, TSH is the hormone that stimulates the thyroid to release more T3/ T4 hormones (one is converted to the other). If T3 and T4 hormones get low, more TSH will be produced and the thyroid will release more T3/T4. So TSH can be high in response to a short-term dip in T3/T4 levels which can be caused by medicine or as the body's response to a virus or infection. www.about.com has some very good information about thyroid issues.
FAsting before t3 t4 And tsh is it necessARY?
no
What condition results in low TSH levels and increased T3 and T4 levels?
Hyperthyroidism would be a condition in which T3 and T4 are at increased levels.
What is t3 and t4?
t3 is tjnrk;sjdfnhdsf and t4 is ttkjdsbgf;jdbfvgk;jdfbg;a
What does low tsh and normal t3 and t4 mean?
I have a lowTSH,0.06 and within the normal range readings of T3,T4 I am being treated for Hypothyroidism, have weight gain problems, dry skin etc. Should my current dose of 150 be increased to 200?
The release of T3 and T4 from thyroid as a result of changes in level of TSH in blood is an example of what kind of stimuli?
The release of T3 and T4 from the thyroid resulting from changes in TSH level is an example of a Negative feedback system.
In thyroid what is t3 t4 test what is the best way to track hypo thyroid?
T3 is triiodothyronine, and is the active form of the hormone secreted by the thyroid. T4 (thyroxine) is another form of thyroid hormone which must be converted to T3 by your body via the deiodinase enzyme. Although T3 is active, your body produces much more T4. The best way to monitor low thyroid function is by looking at TSH (thyroid stimulating hormone). TSH will be high if the thyroid is not producing enough T3/T4. For the majority of hypothyroid cases, only TSH needs to be monitored. For hyperthyroidism and some hard to treat hypothyroid cases, the doctor will test T3 and T4.
What tests are needed to diagnose hypothyroidism besides tsh?
In addition to the test for TSH, the value of which is questioned by some, T3, T4, and Free T3 and Free T4 are often used to help diagnose hypothyroidism. A Reverse T3/Free T3 Ratio is also used by some doctors.
What is difference between t3 and t4 thyroid hormones?
TSH is commonly accepted today as the first-line diagnostic test for overall thyroid function. In general, a normal TSH level (0.3-4.5) indicates normal thyroid function. If the TSH is high or low, then T4 and T3 (and their "free" forms, FT4 and FT3) are evaluated to narrow the diagnosis.
What gland synthesizes T3 and T4 hormones?
The hormone that regulates the synthesis and secretion of T3 (Triiodothyronine) and T4 (Thyroxine) by the thyroid gland is thyroid stimulating hormone (TSH) that is produced and secreted by the anterior pituitary gland, also known as the adenohypophysis.
What stimulates production of t3 and t4?
Thyroid stimulating hormone (TSH) stimulates the thyroid gland to produce T4 (Thyroxine).
