The document discusses the human heart and heart disease. It begins by describing what the heart is and its function of pumping blood throughout the body. It then discusses the growing problem of heart attacks in India, noting that Indians are at higher risk due to genetic factors and often experience heart attacks at younger ages without symptoms. The document lists risk factors for heart disease and symptoms of a heart attack. It concludes by outlining lifestyle prevention strategies for heart disease such as quitting smoking, regular exercise, and following a heart-healthy diet.