A man reports his wife has confusion and slurred speech that have resolved. What is the most likely diagnosis?

The correct diagnosis in this scenario is a transient ischemic attack (TIA). A TIA is characterized by temporary neurological symptoms, such as confusion and slurred speech, which resolve on their own typically within 24 hours. This aligns with the husband's report that his wife's symptoms of confusion and slurred speech have resolved, indicating that they were likely due to a temporary interruption in blood flow to the brain.

In contrast, a hypoglycemic episode could cause similar symptoms, but it would typically be associated with other signs related to low blood sugar, such as sweating or palpitations, and those symptoms would resolve upon administering glucose. Hypothyroidism generally presents with more chronic and systemic symptoms rather than acute neurological changes. A right-sided cerebrovascular accident (CVA), commonly known as a stroke, would typically result in lasting neurological deficits if the symptoms were due to this condition, rather than resolving completely as noted.