Which of the following is a risk factor for developing atrial fibrillation?

Advanced age is a well-established risk factor for developing atrial fibrillation (AF). As individuals get older, the structural and electrical properties of the heart change. This includes alterations in the atrial tissue that can lead to the development of AF. The incidence of atrial fibrillation increases significantly after the age of 65, highlighting the association between aging and an increased likelihood of this arrhythmia.

Additionally, several mechanisms may contribute to this increased risk with age. These include the accumulation of comorbid conditions such as hypertension, heart failure, and coronary artery disease, all of which are prevalent among older adults and can further predispose individuals to AF. Moreover, the changes that occur in the conduction system of the heart and atrial enlargement also play significant roles in developing AF as one ages. Therefore, being of advanced age is directly correlated with a higher risk for atrial fibrillation.