The term "heart function" refers to how well the heart is able to pump blood throughout the body. It involves several factors, including the strength and rhythm of the heartbeat, as well as the ability of the heart muscle to relax and fill with blood between beats. Heart function can be affected by various conditions such as coronary artery disease, high blood pressure, valvular heart diseases or congenital heart defects. Regular check-ups and monitoring are important for maintaining good heart health and detecting any potential issues early on.