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单词 Right Axis Deviation
释义

Right Axis Deviation

英语百科

Right axis deviation

The hexaxial reference system is a diagram that is used to determine the heart's electrical axis in the frontal plane.
A very slight right axis deviation, possibly due to height and not a posterior block, approximately 110° from lead I+. One can tell the rough angle by which lead is isoelectric (or biphasic); in this case lead I is most biphasic and thus we know the axis is roughly perpendicular to this lead. However, the downstroke of lead I is slightly larger than the upstroke so we know it is slightly more than 90°.

Right axis deviation (RAD) is a heart condition wherein the electrical conduction of the heart has an electrical axis greater than +90° (or sometimes greater than +105°) on a 12-lead ECG. When the axis is extremely deviated to the right (i.e. between 180 degrees and -90 degrees) the condition may be termed extreme right axis deviation or northwest deviation).

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更新时间:2025/6/23 21:14:14