Which of the following symptoms is NOT commonly associated with congestive heart failure?

In the context of congestive heart failure, increased energy levels are not a commonly associated symptom. Congestive heart failure is characterized by the heart's inability to pump blood effectively, which often leads to various symptoms, including fatigue, reduced exercise tolerance, and a general feeling of weakness. As a result, individuals with this condition typically experience diminished energy levels rather than increased ones.

On the other hand, dyspnea on exertion, edema of the lower extremities, and weight gain are indeed frequently observed symptoms in patients with congestive heart failure. Dyspnea on exertion occurs when the heart cannot supply enough oxygenated blood during physical activity, leading to shortness of breath. Edema develops due to fluid retention, which is a result of the heart's impaired ability to handle blood flow. Weight gain can also occur due to fluid accumulation in the body, further reflecting the disturbances in fluid balance caused by the heart's compromised function.