World Heart Day on September 29th focuses on using and knowing your heart. The theme emphasizes learning about heart health to better care for your heart. Cardiovascular disease is the leading cause of death worldwide, with over 18.6 million deaths per year from conditions like heart attack and stroke. Risk factors include high blood pressure, diabetes, obesity, and smoking. While some risks like family history cannot be changed, lifestyle changes can lower risks like maintaining a healthy diet, exercise, weight, and stress levels.