Identify a risk factor for developing atrial flutter.

Chronic lung disease is a recognized risk factor for developing atrial flutter. Conditions such as chronic obstructive pulmonary disease (COPD) or interstitial lung disease can lead to changes in the heart's structure and function. These alterations can promote the reentry circuits that are characteristic of atrial flutter. In patients with chronic lung disease, factors like hypoxia, increased pulmonary pressure, and electrolyte imbalances may contribute to the arrhythmia by affecting the heart's electrical system.

On the other hand, regular exercise is generally associated with cardiovascular health benefits and can help reduce the risk of arrhythmias. Low cholesterol levels are often indicative of a lower risk for cardiovascular issues, while youth is typically associated with a lower risk of developing arrhythmias, including atrial flutter. Therefore, chronic lung disease stands out as a significant risk factor due to its direct impact on heart and lung function.