Final answer:
Atherosclerosis is the condition that occurs when blood flow to the heart is blocked or reduced.
Step-by-step explanation:
The condition that occurs when blood flow to the heart is blocked or reduced is known as atherosclerosis. Atherosclerosis is a condition in which fatty deposits, called plaques, build up in the arteries leading to the heart, causing them to narrow and restrict blood flow. This can lead to chest pain, known as angina, or a heart attack.
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