What these deaths had in common was the victims’ absolute belief that there was an external force that could cause their demise and against which they were powerless to fight. This perceived lack of control, Cannon postulated, resulted in an unmitigated physiological response in which blood vessels constricted to such a degree that blood volume acutely dropped, blood pressure plummeted, the heart acutely weakened, and massive organ damage resulted from a lack of transported oxygen.
