Arteries usually carry oxygenated blood away from the heart. However, the pulmonary artery carries deoxygenated blood. If a defect occurs in this artery, then the possible effect will be on the supply of deoxygenated blood to the . Similarly, a defect in pulmonary veins may lead to a block in the supply of oxygenated blood to the
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this would result in less blood supply to the heart
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A heart attack is a medical emergency. A heart attack usually occurs when a blood clot blocks blood flow to the heart. Without blood, tissue loses oxygen and dies.
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