Several people are admitted to the critical care unit, including (1) a 79-year-old man with a small anterior myocardial infarction and no prior cardiac history, (2) a 47-year-old man being given...

Several people are admitted to the critical care unit, including (1) a 79-year-old man with a small anterior myocardial infarction and no prior cardiac history, (2) a 47-year-old man being given contrast media during a diagnostic procedure, (3) a 17-year-old adolescent with a cervical spine injury after a diving accident, and (4) a 72-year-old woman who was admitted with a bowel perforation caused by intestinal malignancy. Discuss what additional assessment information is needed to determine which of these patients has the potential to develop shock and the rationale for your decision.