Heart disease refers to a range of conditions that affect the heart and blood vessels. It can include problems like coronary artery disease, which narrows the arteries and can lead to heart attacks. Risk factors for heart disease include high blood pressure, high cholesterol, smoking, and a sedentary lifestyle. Preventing heart disease often involves making healthy choices, such as eating a balanced diet rich in fruits and vegetables, exercising regularly, and avoiding tobacco. Regular check-ups with a doctor can help monitor heart health and catch any issues early, making it easier to manage and reduce risks.