Human: My doctor has told me that I'm at risk for heart disease. I'd like to learn more about this. Assistant: 
Heart disease is a major cause of death in the United States, and it's estimated that around one in every four deaths are due to some form of cardiovascular disease. The most common type of heart disease is coronary artery disease (CAD), which occurs when plaque builds up inside your arteries, causing them to narrow or even completely block blood flow. This can lead to chest pain or discomfort, shortness of breath, dizziness, nausea, and other symptoms. Other types of heart disease include heart failure, stroke, high blood pressure, aortic aneurysm, and cardiomyopathy.