What are the common symptoms of heart disease in cats, and how does coughing play a role in diagnosing this condition?

Common symptoms of Heart disease in cats include lethargy, difficulty breathing, decreased appetite, and weight loss. Coughing can be a significant indicator of heart disease in cats, as it may suggest fluid buildup in the lungs due to heart failure. If a cat is coughing persistently, it is important to seek veterinary attention for a proper diagnosis and treatment.