![]() If you have been told that your QTc is close to the upper limit of the normal range, you should make sure that any new medications are screened for the possibility of further prolonging the QTc interval before you take them. QTc prolongation can sometimes be minimized by having a doctor or pharmacist look over your medication list to see if any of your medications may be contributing. This is because it the prolongation takes place in only a fraction of a second.Ĭlick to enlarge Who gets QT Interval Prolongation? Although one can often feel when the heart beats very fast, or if it skips a beat, usually people cannot feel if the time it takes for their heart to beat is increasing.When determining if the QT interval is prolonged due to medications, a corrected value is used, known as the QTc interval. QT prolongation is when the QT interval takes longer to complete that usual. What does QT Interval Prolongation look like? Importantly, up to 20% of healthy people have a QTc interval outside of this range Some references use an upper limit of normal of 470 msec.Between 390 - 450 milliseconds for a man.Some references use an upper limit of normal of 480 msec.Between 390 - 460 milliseconds for a woman.There are different phases of a heart beat, with the QT-phase being one of them. Electrode pads are placed on the chest and measure the electrical conductivity through the heart. This is often abbreviated as an ECG, or EKG. The QT interval is measured using a painless procedure called an electrocardiogram. Side Effect: QT Interval Prolongation What is the QT interval? Did you know? We are now a 501c3 non-profit organization, so your donations are tax-deductible. ![]()
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