Answer: 1. Monitoring
Explanation: The root operation for the procedure described in the question is "Monitoring."
In this case, the patient was admitted to the hospital for pneumonia and was already four weeks post an acute non-ST myocardial infarction. The purpose of the procedure is to monitor the patient's condition using bedside telemetry.
Monitoring is a root operation in medical coding that involves observing and recording physiological or diagnostic data. It does not involve any active intervention or treatment. In this scenario, the healthcare team is monitoring the patient's vital signs and cardiac activity through bedside telemetry to ensure that her condition is stable and to detect any abnormalities.
To summarize, the root operation for the procedure in this case is "Monitoring" because the healthcare team is observing and recording the patient's vital signs and cardiac activity using bedside telemetry.