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胃大部切除术后出现贫血主要是由于减少了
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But coronary arteries can become blocked usually by a buildup of cells, fat and __________(1 word) which is called plaque.
The heart needs blood and the oxygen the nutrient carries to _________________ (2 words).
When you are active or ____________________ (2 words), the heart needs even more blood. But if the coronary arteries become blocked, there might not be enough blood flow to the _________________________(2 words).
This lack of blood and oxygen, which is called ischemia, might cause symptoms like an irregular heart rhythm, __________________________________(3 words) and angina which is another name for ______________________________( 4 words) in your chest.
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