1859, action of barring; man-made barrier in a stream, from French barrer to stop, from barre bar, from Old French barre (see bar (n.1)). Artillery sense is 1916, from World War I French phrase tir de barrage barrier fire intended to isolate the objective. As a verb by 1917.
What happens in cardiac arrest. 1  Once the usual blood circulation stops, oxygen delivery to all vital organs is also stopped. 2  The pulse that is usually seen in the carotid artery in the neck as well in the wrists and ankles is lacking. 3  Cardiac arrest may lead to sudden cardiac death or SCD.
While a cardiac arrest may be caused by heart attack or heart failure, these are not the same. Prevention includes not smoking, physical activity, and maintaining a healthy weight. Treatment for cardiac arrest is immediate cardiopulmonary resuscitation (CPR) and, if a shockable rhythm is present, defibrillation.