Stiff blood vessels make your heart work harder. This low-tech test may help you prevent a heart attack.

血管硬化会使心脏工作更困难。这种低科技测试有可能帮助你预防心脏病发作。

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Stiff blood vessels make your heart work harder. This low-tech test may help you prevent a heart attack.

血管硬化会使心脏工作更困难。这种低科技测试有可能帮助你预防心脏病发作。

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