What is a heart attack?

What is a heart attack?

• A. Occurs when blood flow to a part of the heart is blocked for a long enough time that part of the heart muscle is damaged or dies.
• B. A sudden loss of consciousness with no warning.
• C. A severe allergic reaction causing hives and swelling.
• D. A rare disease of the heart.

Answer: (A)

A heart attack happens when blood flow to part of the heart muscle is blocked long enough that that area of heart muscle is damaged or dies. This usually occurs when a coronary artery becomes blocked by a clot after a plaque rupture, cutting off oxygen and nutrients to a patch of heart tissue. The key idea is that the blockage leads to ischemia and then tissue death if not resolved promptly, which is why this description fits a heart attack so well. The other scenarios describe different conditions: a sudden loss of consciousness with no warning points to fainting or sudden cardiac arrest rather than a heart attack; a severe allergic reaction with hives and swelling is anaphylaxis; a vague “rare disease of the heart” doesn’t specify the blockage and resulting muscle damage that defines a heart attack. If someone shows signs of a heart attack, seek emergency care immediately.

A heart attack happens when blood flow to part of the heart muscle is blocked long enough that that area of heart muscle is damaged or dies. This usually occurs when a coronary artery becomes blocked by a clot after a plaque rupture, cutting off oxygen and nutrients to a patch of heart tissue. The key idea is that the blockage leads to ischemia and then tissue death if not resolved promptly, which is why this description fits a heart attack so well.

The other scenarios describe different conditions: a sudden loss of consciousness with no warning points to fainting or sudden cardiac arrest rather than a heart attack; a severe allergic reaction with hives and swelling is anaphylaxis; a vague “rare disease of the heart” doesn’t specify the blockage and resulting muscle damage that defines a heart attack. If someone shows signs of a heart attack, seek emergency care immediately.