Heart diseases refer to a range of conditions that affect the heart's structure and function. Common types include coronary artery disease, heart failure, and arrhythmias. These conditions can lead to serious health issues, such as heart attacks or strokes, and are often linked to risk factors like high blood pressure, high cholesterol, and smoking. Preventing heart diseases involves maintaining a healthy lifestyle, including regular exercise, a balanced diet, and avoiding tobacco. Early detection and management of risk factors are crucial for reducing the likelihood of developing heart-related problems. Regular check-ups with a healthcare provider can help monitor heart health.