Course deviation. The course deviation bar deflects rightward or leftward to indicate displacement of the aircraft to the right or to the left, respectively, of the selected course.

The QRS axis was of no significant difference between RVIS pacing and sinus rhythm. However, there were tendency toward right deviation at RVOT pacing and toward left deviation at RVA pacing.

At the lower belt upward direction is the deviation of the roller group should move to the left, move right upper supporting roller group.