Preejection

The severity of damage to the aircraft in combat was responsible for more preejection injuries, unconsciousness, and allowed less time to prepare for ejection.

Events in vomiting are usually divided into preejection, ejection, and postejection phases (Fig. 11-1 3). The preejection phase is characterized by licking, salivation, pallor, and changes in visceral function such as tachycardia and the relaxation of the proximal stomach.

The preejection shortening and relengthening correspond to septal beaking and flash.

We have therefore used the R-S₂ interval assuming that any prolongation that may occur is most likely a result of lengthening of R-S₁ (including preejection) rather than S₁-S₂ .

During systole, two main phases occur: preejection and ejection.

This is seen as abnormal rapid leftward motion of the septum during preejection followed by rightward (paradoxical) motion.