Right Axis Deviation

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

Right Axis Deviation (RAD) is a heart condition where the electrical conduction of the heart is greater than +105 degrees or between -90 degrees and +180 degrees (may be called Indeterminate) or more often extreme Right Axis Deviation. The degrees may be determined by a 12-lead ECG (EKG=German).

Right axis deviation EKG examples

The below EKG image shows

• Right axis deviation (> 90°)
• R/S ratio of more than 1
• T wave inversion in right precordial leads indicating strain pattern
• Abnormal P wave in V1 indicating left atrial abnormalities

Related chapters

• Electrocardiogram#Axis

Sources

Copyleft images obtained courtesy of ECGpedia, http://en.ecgpedia.org/index.php?title=Special:NewFiles&dir=prev&offset=20080806182927&limit=500