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This is my first post, so please excuse the length. In April 2006 I ended up going to A&E following bouts of atrial fibrillation that were becoming more frequent and longer and my resting pulse rate had gone up from its normal 52 to 67. A blood test at the hospital showed my T4 reading was 48.7 (I don't remember the TSH or T3 readings). My follow up appointment 6 weeks later in Endo showed that my T4, TSH and T3 were all within normal range and the epsiode was diagnosed as Thyrotoxicosis.
About 6 weeks ago my resting heart rate went up again from 51 to 65 but I didn't think anything of it. I've also lost about 6kg in weight over the last 5 weeks and the bouts of atrial fibrillation were becoming more frequent and lasting longer. A trip to A&E whilst having the atrial fibrillation showed that my T4 was 64.9 and TSH 0.05 (I don't have the T3 reading). My GP started me on 7.5mg/day bisiprolol and 40mg/day of carbimazole last week and this upped to 60mg/day by and Endo consultant I saw on Tuesday. He's asked me to stay on 60mg/day for the next four weeks and have a blood test in 3. Aside from the AF, the other main symptoms I have are night sweats, tremor and hoarse voice for the last 3 weeks. I had an ultrasound scan on my thryoid yesterday evening - the dr doing the scan said it looked normal and there were nodules, lumps or increased blood flow to it. So the questions I have are: how long does carbimazole take to settle the symptoms as I'm still getting bouts of AF (the beta blockers done't seem to be doing anything to prevent it) and could this be Graves (which the consultant suspects and is doing further blood tests for)?
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