Corrected QT Interval Calculator
By simply entering the QT interval duration and heart rate into the QTc calculator, you may rapidly determine the corrected QT interval. The QTc is used to estimate the QT interval.
Steps to calculate Corrected QT Interval & formula
When a heart is beating at a rate of 60 beats per minute, the QTc calculator is used to calculate the corrected QT interval, which is an estimate of the QT interval. Practitioners can compare QT readings overtime at various heart rates by determining the corrected QT interval. It can also assist doctors in determining which patients are more likely to have arrhythmias(irregular heartbeat).
Men have a QT of fewer than 0.45 seconds while women have a QT of fewer than 0.46 seconds. If the levels differ greatly from these values, the patient may be experiencing ventricular tachyarrhythmias.
This is a useful health tool that calculates the QT-adjusted interval using the heart rate in beats per minute and the QT interval in seconds or milliseconds. The ECG test can be used to determine the QT values.
Because it gives estimations from four distinct equations, this QTc calculator is supposed to represent the QT corrected interval for heart rate extremes.
QTc can be calculated using a number of formulas. The following are some of them:
Bazett's formula (logarithmic correction): QTc = QT × RR -1/2
Fredericia's formula (logarithmic correction): QTc = QT × RR -1/3
Hodges formula (linear correction): QTc = QT + 1.75 (heart rate – 60)
Framingham formula (linear correction): QTc = QT + 0.154 × (1 - RR)
Where,
RR Interval = 60 / Heart Rate (expressed in seconds).
Based on the patient's heart rate in beats per minute, this QTc calculator calculates the corrected QT interval in seconds or milliseconds.
You will be able to fix the QT interval for your patient's heart rate using our QTc calculator. You'll learn how to compute QTc using Bazett's formula and other formulae in the next sections (e.g. Fridericia, Framingham). We also go through what a normal QT interval is, the dangers of QT prolongation, and which QT-prolonging medicines to avoid when treating patients with a prolonged QT interval.
You can check the following below for a better understanding to calculate the Corrected QT Interval and for more topics by visiting the site called onlinecalculator.guide
Example for Corrected QT Interval
1. By using the bazett formula, calculate the corrected QT of the QT interval is 0.40 sec, and the heart rate is 50 bpm.
Solution:
Given that,
QT interval is 0.40 sec
The heart rate is 50 bpm
The QTc Formula: QTc = QT × RR -1/3
RR interval = 60 / HR
Therefore, The Corrected QT interval (QTc) is 0.3764 sec
FAQs on Free Online Corrected QT Interval Calculator
1. What is the QT interval?
The QT interval is an ECG test used to analyze some of the heart's electrical properties. It is defined as the time between the start of the Q wave and the conclusion of the T wave, which is close to the time when the heart chamber begins to contract following relaxation.
2. What is the purpose of this QTc calculator?
This is a useful health tool that calculates the QT-adjusted interval using the heart rate in beats per minute and the QT interval in seconds or milliseconds. The ECG test can be used to determine the QT values.
3. What is the short QT syndrome and how does it affect you?
Because of the QT interval shortening means that the heart needs less time to recharge/ rest between beats, this condition can induce arrhythmia, which is a disruption in the heart's regular rhythm. However, there are no underlying anatomical abnormalities of the heart.