Final answer:
The key features of the progressive stage of shock include increased heart rate, decreased blood pressure, and decreased urine output. Aggressive therapy is necessary to reverse the progressive stage of shock and prevent organ failure and death.
Step-by-step explanation:
The progressive stage of shock is a life-threatening condition in which the circulatory system is unable to maintain adequate blood flow to the tissues. Key features of the progressive stage of shock include an increased heart rate, decreased blood pressure, decreased urine output, confusion, and loss of consciousness. Aggressive therapy is necessary to reverse the progressive stage of shock because without intervention, it can lead to organ failure and death. Aggressive therapy may involve providing intravenous fluids, administering medications to restore blood pressure, and addressing the underlying cause of shock.