Everyone have their unique relationship between heart rate and QT interval. People with SQTS (Short QT syndrome) have a fixed QT interval, say, 260 msec regardless of heart rate. If such a person had a heart rate of 200, the formula would show a long QT interval. Which clearly is wrong.
My QT interval is somewhat less rate-dependent than what is normal. It really doesn't matter.
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".
Actually, I think your qt interval might be in the normal range. According to wikipedia, the normal range is between 350 and 440 milliseconds.
Keep in mind that long qt syndrome, which is the actual worry, can occur in people with relatively normal QT intervals. Wikipedia describes a point system that is used to diagnose people, but in some cases genetic information may be the deciding factor. To your heart rate statement, 0.
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.
Yesterday I had an EKG for an upcoming surgery. It came back stating Abnormal results, prolonged QT interval.... QTc >490ms. In my twenties I had 3 to 4 bouts of tachycardia, with a pulse of 190 or more. The hospital did an EKG and found nothing, and I have not had this expierence since ( I am a 47 year old female) My Dr has ordered another EKG for next week but I am wondering what this all means. The statements on the internet about sudden cardiac arrest scare me to death!
Yesterday I had a further ecg (to check my qt interval as I am withdrawing from zoloft and it had previously caused a slight prolongation of my qt interval (470ms). I was so nervous during the ecg that my heart rate was around 120 bpm and I felt a few pvcs etc.... The computer diagnosis said 'sinus tachycardia" and "left anterior hemiblock". My GP said he didn't think I had a hemiblock, but noted the QRS duration was a little wide - 55ms.
Hello.
Yes, you should contact your doctor, and possibly get a 24 hour heart rate monitoring, to see how your heart rate changes during 24 hours. An extra reason for concern is the QT interval (did you have a prolonged QT?) in which setting it's not desireable with a too slow heart rate, because the QT interval further prolongs with slower heart rate.
That said, if you recently lost 100 pounds and is exercising almost every day, the results aren't necessarily abnormal.
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.
The Holter monitor measures QT interval (min, average, max) and is a better measurement for QT time than a short resting EKG.
In addition, LQTS is usually shown on EKG as changes in the T wave (enlarged, notched, etc). The diagnosis is confirmed by genetic testing.
I think it's a good idea to see another cardiologist for this specific diagnosis, and you should bring a copy of your first EKG and possibly the Holter report, just for him to compare with his tests.
The ECG showed repolarization disturbances, negative, flat or low negative T in V3, V2, V4, V5, and V6 and long QT interval. They were talking about admitting me, but couldn't get a bed, so I was told to go home and if I had another severe attack to go to the ER by ambulance. Since then, I have continued with the palpitations, lightheadedness, and some blurring of my vision, but nothing as severe as the near fainting incident. The slightest bit of excertion brings on an episode.
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