This section explains what heart failure is. Heart failure means your heart isn’t pumping blood as well as it should. You’ll learn about the different types, how doctors find out if you have it, and common signs like feeling tired, short of breath, or swelling. It also talks about things that can cause heart failure, like high blood pressure or diabetes. You’ll also learn how doctors figure out if someone has heart failure. They look at your symptoms, ask about your health history, and do a check-up. Doctors use tests like blood tests, chest X-rays, EKGs, and heart ultrasounds. Sometimes, they use special tests to look at your heart more closely