GCSE Combined Science (AQA)

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Coronary Heart Disease

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Organisation Animal Tissues, Organs and Organ Systems

Coronary Heart Disease

1:55 Coronary Heart Disease
Spec 4.2.2.4
Previous Health & Disease Next Faulty Heart Valves
  • Coronary heart disease is a non-communicable disease of the coronary arteries.
  • It is a type of cardiovascular disease affecting the circulatory system.
  • Arteries carry blood at high pressure from the heart to the organs.
  • Coronary arteries supply the heart muscle with blood containing glucose and oxygen, allowing the heart to beat effectively.
  • Coronary heart disease develops when fatty material builds up in the coronary arteries, causing narrowing and reduced flexibility of the artery walls.
  • Causes of coronary heart disease include an unhealthy lifestyle, high blood pressure, smoking, excessive alcohol consumption, high cholesterol, and a poor diet rich in saturated fats.
  • High cholesterol is essential for cell membranes but can lead to cardiovascular disease if levels are high in the blood.
  • Consequences of coronary heart disease include blocked coronary arteries, which prevent sufficient oxygenated blood from reaching the heart muscle.
  • This can lead to a heart attack.

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