Which factor does not increase the risk of atrial fibrillation in predisposed individuals?

Atrial fibrillation (AF) is a common cardiac arrhythmia that may develop in individuals with various risk factors. Among the factors mentioned, acute esophagitis does not directly contribute to an increased risk of developing atrial fibrillation.

The other options provided are well-documented contributors to AF. Hypertension is a significant and recognized risk factor that can lead to structural and electrical changes in the heart, predisposing individuals to AF. Additionally, excessive alcohol intake is particularly concerning for those with a pre-existing susceptibility, as it can trigger or exacerbate episodes of AF. Theophylline and pseudoephedrine can also stimulate the heart and potentially lead to arrhythmias, including atrial fibrillation, particularly in sensitive individuals.

Acute esophagitis, while it may cause discomfort or complications related to swallowing, does not share a direct physiological mechanism that would increase the likelihood of AF. Thus, recognizing that it does not belong to the list of risk-enhancing factors provides clarity in understanding the contributors to atrial fibrillation.