Which of the following is a common indicator of fatal trauma?

Cardiac arrest is a common indicator of fatal trauma. When a severe traumatic event occurs, it can lead to significant disruptions in bodily functions, particularly affecting the cardiovascular system. This may result in the heart ceasing to pump effectively or entirely, which manifests as cardiac arrest. During such events, the body may not receive adequate blood flow, depriving vital organs of oxygen and nutrients. This condition is often the result of massive hemorrhage, traumatic brain injury, or severe chest trauma, all of which can lead to immediate life-threatening situations.

In contrast, while respiratory distress can indicate a serious issue and may accompany fatal trauma, it does not inherently confirm a fatal outcome. Similarly, cognitive impairment can result from brain injury but is not a definitive indicator of fatal trauma. Severe edema, or swelling, may occur due to various causes and does not specifically point to traumatic fatality. Thus, cardiac arrest serves as a direct and critical indicator of life-threatening conditions commonly associated with severe trauma.