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Clonidine qt

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Avatar m tn Hi - I have some questions about long QT syndrome. I've recently had 3 EKGs because of palpitations and a fast heartbeat. I've asked the doctor who did them about long QT and each time he said there was nothing showing I had it. My QT/QTc was 350/418 on the first one I believe, on the second 362/425 and on the third 358/440. Heartbeat was 86, 83 and 91 respectively. The last one is the one that got me worried, because apparently 440 is the limit for normal.
Avatar m tn Sounds like a horrible diet, which could cause a lot of problems, including low potassium (and long QT), anxiety, low magnesium (and long QT), vitamin defiency, etc. You need at least 3000 mg of potassium daily, and preferrably 3.500-4.700 mg (guidelines vary between countries, in Norway it's 3.700). I think your prolonged corrected QT interval was caused by 1) Mathematical overestimation from the Bazett formula due to a high heart rate, and 2) Low potassium.
Avatar m tn Thanks for your reply. If it changes anything, I have also found an earlier EKG with a ventricular rate of 96 and QT (uncorrected) 326. Shouldn't my uncorrected QT be lower, or does it stop decreasing with increased heart rate like this? Sorry for disturbing you with such questions, but my anxiety sometimes gets the best out of me...
Avatar n tn Yes, a well known side effect of the majority of SSRI''s is that they can prolong the QT interval. This does not mean that they will and "prolonging" the QT interval is not the same thing as having a "prolonged QT interval".
Avatar f tn m not a physician) is that Zoloft may prolong QT interval. I think uncorrected QT of 448 msec is slightly long at heart rate 71. I would recommend that you ask a cardiologist and preferrably bring the EKG. Do not stop taking Zoloft without talking to your doctor.
1425157 tn?1311651679 Hi,I have a history of pvc and pac i take atenolol 50 mg a day for this,no high blood pressure ,,i have had many ecg and a few holters and an echo,,and an av node signal average test,,no one has ever mentioned a long qt interval before -i am haveing gall bladder surgery soon and as a precaution they sent me to internist who ordered this last holter,saw clinic doc today for results he said it showed a long qt interval and he did and ecg then and there- no long qt on that one -i was haveing an an
Avatar f tn I would also check your EKG to see what the QRS duration is -- often when people have mobitz type I, the QRS is also widened, which would “stretch out” the QT interval -- a prolonged QT in this setting would not be considered a true QT prolongation.
Avatar n tn my daughter had 2 ekgs and showed a QT interval of 468 with a heart rate of 68. Obviously this is a prolonged qt, but what are the odds that it is Long QT syndrome? If it isn't, what is it???? I can't find any answers. I do know that it is considered a borderline QT interval until it hits 470. If she doesn't get diagnosed with long qt syndrome (cardiology appointment is next week) Does it just mean that she has a long qt interval and nothing else?
1124887 tn?1313754891 However, I would not consider prolongation of the QT interval to 388 ms to be of any clinical significance and would tell one of my patients to not have any anxiety about that change. In regards to QT dispersion. the QT interval varies from lead to lead. The QT interval can vary by up to 65 msec in normal people between leads. The QT dispersion is typically longest in leads V2 and V3. Again, your QT dispersion is well within normal limits.
Avatar f tn Long QT Syndrome is normally a lifelong condition. That being said, a prolonged QT interval can be caused by medication or electrolyte abnormalities, even in healthy individuals without Long QT Syndrome. Additionally, some individuals with Long QT Syndrome don't have a consistently prolonged QT interval. It's possible to have a occasional normal EKG, and still have Long QT Syndrome.
Avatar m tn What do you mean by "EKG showed problems with QT intervals"? The reason I ask is that the QT interval has to be corrected using something like the RR interval to have real meaning. RR is just the time interval from beat to beat, and if you have bradycardia there might need to be more correction going on. On the other hand, some drugs affect the QT interval. If you do have a prolonged QT caused by drugs, I should think it should be reversible when you stop taking the drug.
Avatar n tn My holter only shows pac 7 beats and other than that is fine. My qt avg was 383 and qtc avg was 398. My QT max was 467 and QTc max was 480 msec. My percentage of QTc greater than 450 ms was 0%. The other two ekg that I was done about 4 years ago show qt 372 qtc 421 and qt 360 qtc 428. My echo is fine.
Avatar f tn My internal medicine doctor of 12 years wants me to see a cardiologist. But it is soooooo rare to diagnose Long QT on ECG. I have had an episode of documented Long QT on ECG when I was hypokalemic (low potassium). After exhaustive research on internet, I found that the genetic blood test for Long QT Syndrome only identifies 70% of Long QT cases. So you have a 30% chance of getting a negative test and still have the syndrome. The test is $5,000 for one person.
Avatar m tn I am a worrier and saw a different EP to confirm I have nothing to worry about and he said he definitely thinks I have a long qt. What? He said he doesn’t think I have long qt syndrome, but that I just have a long qt. He said he agrees with the computer printouts and says the computer printouts are usuallly pretty accurate. I asked him to manually calculate one of the ekgs and he said he came out with a range from 460-490 on just one of them.
Avatar n tn Hello, Last sunday my 12 year old daughter stood up quickly from the couch and fainted without warning. This had never happened before. She came to almost immediately and said she felt fine. Just prior to fainting she had been sleeping for about 12 hours and also had had nothing to eat or drink for close to 14 hours. When we took her to the ER they found that her QT was 459. The next day the EKG was repeated and was 441.
Avatar n tn There are many things that go into reading QT and corrected QT (QTc) on an EKG. The important thing to remember is that the EKG measurements are often not correct. The other important point is that it sounds like your family history is mostly coronary artery disease and not just sudden death. I think it is very important that you gather your medical records and see a cardiologist or cardiac electrophysiologist.
Avatar f tn 2 days ago, I got really stressed at work and had a moderate panic attack, I went to the GP and they did an ECG to reassure me. Everything was fine except the Qt/Qtc which was 446/488 (heart rate was 72). the doctor there said not to worry. Today I had another ECG with my local GP. The result for the Qt/Qtc was 404/484. I guess now I am really worried, all previous ECGs have been perfect. My Dr says ECGs are inaccurate and has sent the reading to a cardiologist. My questions are: 1.
Avatar f tn The QT interval varies with the heart rate and the faster the rate the shorter the QT and with slow heart rates the QT prolongs. However 695 is distinctly abnormal and clearly requires further workup. As mentioned drugs can also alter the QT interval. At slow heart rates --in the 40's the QT can approach 500 msec in normal women.
Avatar f tn I recently went to an urgent care facility because of a panic attack, and my QT (assuming QTc, as the computer read it) was bordlerine prolong qt. I believe it was 440ms. I then went to several er visits and my GP because of chest pain which they said was due to anxiety. I had 3 more EKG's, all of which docs said had normal QT values. Being terrified still beacause of chest pains, I went to see a Cardiologist who was also an Electrophysiologist.