Heart disease is the general term for problems that can affect the heart. One type of heart disease is called coronary artery disease. This disease makes arteries become hard and narrow. The blood has a hard time getting through the arteries and the heart muscle does not get all the blood it needs. Heart failure is another type of heart disease. This occurs when the heart is not able to pump blood as well as it should to other parts of the body. A third kind of heart disease is called heart arrhythmia. This means there are changes in the beat of the heart. Most people experience this now and then. However, if a person experiences dizziness, shortness of breath, and a racing heart, it is cause for concern. 1 What is the CENTRAL IDEA of the paragraph? a. If a person experiences dizziness, shortness of breath, and a racing heart, it is cause for concern. b. Most people experience changes in the beat of their heart now and then. c. Heart failure is a type of heart disease. d. Heart disease is the general term for problems that can affect the heart.