What is heart disease?

• A. An umbrella term for various conditions affecting the heart's structure and function, including coronary artery disease, heart failure, arrhythmias, etc. Typically caused by atherosclerosis that restricts blood flow
• B. A disease of the lungs
• C. A genetic disorder only
• D. An infection of the heart valves

Answer: (A)

Heart disease is a broad term for conditions that affect the heart’s structure or how it works. The best answer captures that breadth, naming the major types—such as coronary artery disease, heart failure, and arrhythmias—and noting that a common underlying process is atherosclerosis narrowing the blood vessels that feed the heart. When those vessels are narrowed, the heart muscle doesn’t get enough blood and oxygen, which can lead to chest pain, heart attacks, or problems with pumping or rhythm. The other options don’t fit the overall concept: a disease of the lungs isn’t about the heart; a genetic disorder only misses the many acquired forms; and an infection of the heart valves is just one specific condition, not the whole category of heart disease.