2025年1月18日 · Reference intervals for QTc duration according to Bazett’s formula. Note that a QTc interval >480 is always considered pathological. For patients with bundle branch blocks, …

2023年9月14日 · Qtcf, also known as Corrected QT Interval, is a measure used in electrocardiography (ECG) to assess the time it takes for the heart to electrically discharge and then recharge, which represents one heartbeat. The QT interval varies depending on the heart rate, so it is often corrected (Qtcf) to provide a more accurate measure.

2024年10月3日 · QTcF（使用Fridericia公式校正心率的QT间期）是一种临床工具，用于校正心脏QT间期随心率变化的影响。QT间期对于理解心脏电活动至关重要，异常延长的QT间期可能预示心律失常的风险，从而可能导致心脏骤停。

2016年6月17日 · To determine which QT correction formula to use in an automated QT ‐monitoring algorithm in our electronic medical record, we studied rate correction performance of different QT correction formulae and their impact on risk assessment for mortality.

2024年10月3日 · QTcF (QT Corrected for Heart Rate using Fridericia's Formula) is a clinical tool used to correct the QT interval of the heart for varying heart rates. The QT interval is crucial for understanding the electrical activity of the heart, and an abnormally prolonged QT interval can signal a risk of arrhythmias, which may lead to sudden cardiac events.

Corrects the QT interval based on its duration on ECG test and the patient’s heart rate. In the text below the tool you can read more about the four QTc equations that are used. The QTc calculator is aimed at determining the corrected QT interval.

This online evidence based resource will help guide you how to measure the QT interval and calculate the QTc value with an easy to use calculator which takes into account the patients underlying rhythm, gender and age.

2023年12月23日 · Normal QTc for males 0.36 – 0.44s. Normal QTc for females 0.36 – 0.46s. The heart rate has a direct impact on the QT interval. When the heart is lower the QT interval is longer and when the heart rate is higher the QT interval is shorter. In order to correct, this corrected QT interval (QTc) is calculated by using a formula.

Learn about QT time (duration), corrected QT (QTc) duration, with emphasis on ECG features and risk of arrhythmia (e.g LQTS).

Input the QT interval data provided by the ECG (msec or sec). Input the patient's heart rate in beats per minute. Choose QT c Formula and then click on the "Calculate" button to generate the corrected QT interval (QT c) figure *.