THE QRS COMPLEX OF THE ELECTROCARDIOGRAM
THE QRS COMPLEX OF THE ELECTROCARDIOGRAM
复制标题
心电图的 QRS 波群
DOI：
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发表时间：
1943
期刊：
影响因子：
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通讯作者：
R. Ashman
中科院分区：
文献类型：
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作者：
M. Gardberg;R. Ashman
心电图是一种记录体表上两点之间存在的电位差的摄影记录，在记录的每一个瞬间。在记录的坐标上，人们读出了潜在的差异；在横坐标上给出了时间。当测量三条标准肢体导联的心电图时，在任意时刻测量任意两条导联的电位差提供数据，人们可以从中计算出该时刻电动势的表观方向和大小，因为该电动势投射在身体的正面。力在每个瞬间的方向是瞬时电轴。由于电动势既有方向又有大小，所以它是一个矢量。人们可以确定心室（或耳廓）心电图的每一个瞬间矢量的大小和方向
The electrocardiogram is a photographic record of the differences in electrical potential existing between two points on the body surface at every instant during the time the record is being taken. On the ordinates of the record one reads the potential differences; on the abscissas the time is given. When the electrocardiogram in the three standard limb leads is made, measurement of the potential differences at any instant in any two leads supplies data from which one may calculate the apparent direction and magnitude of the electromotive force at that instant as that force is projected on the frontal plane of the body. The direction of the force at each instant is the instantaneous electrical axis. Since the electromotive force has both direction and magnitude, it is a vector quantity. One may determine the magnitudes and directions of the vectors for each instant of the ventricular (or auricular) electrocardiogram and