Richard Hamilton, age 67, is admitted to the telemetry unit from the emergency department (ED) with new-onset chest pain. In the ED, his troponin test is negative, a 12-lead ECG is unremarkable, and a chest X-ray shows a calcified aorta. The ED physician orders a computed tomography . . .
Myrna Klein, age 82, is admitted to the medical-surgical unit from the emergency department (ED) at 9 pm for an exacerbation of chronic obstructive pulmonary disease. She also has hypertension, diabetes type 2, and mild dementia. Ted, her nurse, obtains her initial vital signs: heart rate 89 beats per . . .