What commonly triggers atrial fibrillation?

Atrial fibrillation (AFib) is often triggered by various factors, and excessive alcohol consumption is one of the most notable triggers. When individuals consume large amounts of alcohol, especially in a short period, it can lead to changes in the electrical conduction system of the heart, promoting irregular heart rhythms such as AFib. This phenomenon is sometimes referred to as "holiday heart syndrome," which occurs when acute binge drinking triggers atrial fibrillation in otherwise healthy individuals.

In contrast, while dehydration, hypothermia, and caffeine intake can influence heart rhythm, they are less commonly recognized as primary triggers for atrial fibrillation compared to excessive alcohol consumption. Dehydration may lead to electrolyte imbalances that could provoke arrhythmias, but it’s not as directly linked to AFib as alcohol. Hypothermia impacts overall body function and can affect the heart but isn't a specific trigger for AFib episodes. Caffeine can contribute to palpitations and other types of arrhythmias in sensitive individuals, but its effect on AFib is less established compared to the profound impact of excessive alcohol intake.

Therefore, the relationship between excessive alcohol consumption and atrial fibrillation is significant and well-documented, making it the most accurate choice in this context.