What should you do if a patient faints after receiving troubling news?

Choosing to investigate potential heart rhythm issues is appropriate in this scenario because fainting, or syncope, can often be indicative of underlying cardiac problems, especially if it occurs suddenly and in response to emotional distress, such as receiving troubling news. Cardiac causes of syncope can include arrhythmias, which may lead to insufficient blood flow to the brain, resulting in a loss of consciousness. It is essential for an EMT to assess any signs that might indicate a serious condition, such as palpitations, chest pain, or a history of heart conditions, which could warrant further investigation.

Monitoring for dehydration may be relevant in other situations, but it is not typically the first consideration when a patient faints suddenly. Benign fainting episodes may occur, but without further investigation, it would be unwise to assume that the episode is harmless, especially given the context of the trigger. Checking blood glucose levels can be an important part of assessing an unconscious patient, particularly if there are indications of diabetes or other metabolic issues, but it does not directly address the potential cardiac origins of fainting. Thus, investigating heart rhythm issues is the most comprehensive and appropriate response in this scenario.