Rowlands Derek J
Manchester Royal Infirmary, United Kingdom.
J Electrocardiol. 2012 May-Jun;45(3):288-93. doi: 10.1016/j.jelectrocard.2012.01.003. Epub 2012 Feb 21.
The QT interval on the electrocardiogram is an increasingly important measurement, especially in relation to drug action and interaction. The QT interval varies inversely as the heart rate and numerous rate correction formulae have been proposed. It is difficult to compare the effect of applying different formulae at different heart rates and for different measured QT intervals. A simple graphical display of the results from different formulae is proposed. This display is dependent on the concept of the absolute correction factor. This graphical presentation is useful (a) in comparing the effect of the application of different formulae and (b) in directly reading the correction produced by any individual formula.
心电图上的QT间期是一项越来越重要的测量指标，尤其是在涉及药物作用和相互作用方面。QT间期与心率呈反比，并且已经提出了许多心率校正公式。在不同心率和不同测量的QT间期下比较应用不同公式的效果是困难的。本文提出了一种对不同公式结果的简单图形显示方法。这种显示依赖于绝对校正因子的概念。这种图形展示在以下方面很有用：（a）比较应用不同公式的效果；（b）直接读取任何单个公式产生的校正值。
