# using bazett formula when my heart rate is 98 my qt is 350 and qtc 447. but when my heart rate is 60 it is 398. why is it 447 at higher rate?

26 years experience Internal Medicine
QTc: The formula only estimates the corrected qt and it includes the square root of the heart rate as the denominator of the denominator or in other words the corrected QT interval will trend in the same direction, the higher the rate , the higher the QTc.
26 years experience Internal Medicine
I am sorry, you might be miscalculating them as the qt is supposed to decrease at higher rates.
Feb 17, 2020

## On 12 lead exercise ecg my heart rate was 143, Qt 304 and Qtc 475. This is using Bazett qtc formula. At rest my heart rate is 61 and qtc 397. Do I have prolonged qt at high heart rates?

60 years experience Family Medicine

## QTC using Bazetts shows 430 and Friderecia shows 408, so which is right? Heart rate 83 and QT 366.

6 years experience Internal Medicine
Need to see egg: Hi, I can calculate Qtc but would need EKG. are you in atrial fibrillation or in sinus rhythm?

## My qtc was 390 at heart rate 60 then I got my heart rate to 98 a few moments later and qtc was 464! So I have long qt or I dont have long qt?

60 years experience Internal Medicine
Qtc: Are you measuring your heart rate and qtc intervals on a legitimate EKG machine? The normal change with faster heart rates is shortening of the qt int ... Read More

## What is the qt and qtc for heart rate 106?

15 years experience Cardiology
Long QT: The qt interval is measured from your ecg. The qtc is the raw measurement of your qt from ECG corrected for your heart rate of 106. Normal qtc should ... Read More

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