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Q.

Heart attack refers to

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a

the state of heart when it is not pumping blood effectively enough to meet the needs of the body

b

the irreversible necrosis of a part of myocardium due to the sudden deprivation of blood supply

c

partial obstruction of blood flow in the coronary arteries

d

the sudden stoppage of the heartbeat due to nonconduction of electrical impulses from the atria to the ventricles.

answer is B.

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Detailed Solution

A complete obstruction to blood flow in a coronary artery may result in a myocardial infarction (heart attack) in which there is an irreversible necrosis of a part of myocardium because of interrupted blood supply. The tissue is replaced by noncontractile scar tissue and the heart muscle loses some of its strength.

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