Which potential cause is NOT a recognized underlying issue related to BRUE?

The correct choice identifies excessive drinking as a potential cause that is not recognized as an underlying issue related to BRUE (Brief Resolved Unexplained Events). BRUE typically refers to a sudden and brief episode of changes in responsiveness, color, or muscle tone in infants, which is concerning for caregivers but resolves on its own.

Infections, gastroesophageal reflux, and cardiac arrhythmias/anomalies are acknowledged as possible underlying causes for BRUE due to their direct impact on the infant's physiological state. For instance, infections can lead to alterations in an infant’s alertness and physiological functioning, while gastroesophageal reflux may result in episodes that mimic BRUE due to feeding issues. Similarly, cardiac arrhythmias or congenital heart anomalies can manifest with symptoms consistent with BRUE, as they can impact the infant's overall stability.

In contrast, excessive drinking does not have a recognized connection to BRUE in infants. This factor is more relevant in discussions surrounding adult behaviors and health complications rather than infant medical conditions. Thus, it stands apart from the medical considerations associated with BRUE, making it the correct choice as the answer to the question.