Rowlands D J
Br J Hosp Med. 1978 May;19(5):472-81.
The term "electrical axis of the heart" as conventionally used refers to the mean frontal-plane axis of the QRS complex. It is defined as the angle between the mean QRS vector and lead I and can be determined to the nearest 15 degrees by simple inspection of the frontal-plane leads. The axis is related to age and body build and deviates significantly from normal in various disease states. There are two common causes of abnormal LAD and several common causes of abnormal RAD.
传统上使用的“心脏电轴”一词指的是QRS波群的平均额面轴。它被定义为平均QRS向量与导联I之间的夹角，通过简单查看额面导联可确定至最接近的15度。电轴与年龄和体型有关，在各种疾病状态下会显著偏离正常。左偏电轴异常有两个常见原因，右偏电轴异常有几个常见原因。
