Henry Cuthbert Bazett, MD, (d. 1950) was the head of the Department of Physiology at the University of Pennsylvania and was a leader of the American Society of Physiology.

2025年1月18日 · One of the earliest and most widely used correction methods, Bazett’s formula calculates QTc by dividing the QT interval by the square root of the RR interval (the time between two successive R-wave peaks). However, it tends to overcorrect at high heart rates and undercorrect at low heart rates, potentially leading to inaccuracies.

目前大部分参考书中的QTc正常和异常值标准多来源于Bazett公式，因此临床多建议应用Bazett校正QTc值诊断QT间期延长。 一项“ 心脏研究随访计划 ”研究表明： 儿童具有稳定的QTc ,没有性别差异；在健康成年男性和成年女性中，两者有显著差异。

2023年7月5日 · Bazett’s Equation reveals a QTc in excess of 500 msec. This represents QT prolongation and the patient is at risk for Torsades de Pointes. Non-specific ST-T changes

Bazett’s formula for calculating corrected QT duration (QTc). QT correction according to Bazzet, Fridericia, Framingham and Hodges follow in the calculator below. Table 1. Reference intervals for QTc duration according to Bazett’s formula. Note that a QTc interval >480 is always considered pathological.

2024年10月28日 · The Bazett formula ‘corrects‘ the measured QT interval to a value (QTc) attributable to a heart rate of 60 bpm. Thus providing a QT interval value that a particular patient would theoretically have if their heart rate was 60 beats/min

2024年10月8日 · Bazett formula is the most commonly used due to its simplicity. It over-corrects at heart rates > 100 bpm and under-corrects at heart rates < 60 bpm, but provides an adequate correction for heart rates ranging from 60 – 100 bpm. Louis Sigurd Fridericia derived his formula in 1920 from 50 healthy individuals aged 3 to 81 years old.

Online medical calculator to measure the QT corrected (QTc) interval using Bazett equation

Learn about QT interval correction using the Bazett Equation for accurate EKG interpretation and assessment in healthcare practice. QT interval correction adjusts the QT interval on an EKG to account for heart rate variations using the Bazett equation.

QT Interval Correction,QTc: 计算公式; QTc=QT/√(R-R) 结果正常值范围; 0.32～0.44 s: 说明; QT间期受心率影响很大，所以常用RR间期校正，QTc就是RR间期为1秒时的QT间期。 参考文献; 欧阳钦主编. 临床诊断学（八年制）[M]. 人民卫生出版社.2005年