Circulation 杂志中的一个研究发现，尽管医嘱可以减少一半第二次心脏病发作的危险，但是超过四分之一的心脏病患者没有遵从医嘱饮食和锻炼。

A study in the journal Circulation found that more than a quarter of heart attack sufferers did not comply with diet and exercise advice even though it can reduce the risk of a second attack by half.