The investigators say the link between cardiac problems and overtime seems clear but the cause is less so, given the complexities of heart disease and relationships in the workplace.

调查人员表示，心脏问题与加班加点之间的关系看似十分明显，但鉴于心脏病和职场关系的复杂性，原因没有看起来那么清楚。

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The authors of the study say the question of why anxiety disorders are linked to increased risk in patients with coronary heart disease is still not clear.

研究的创始人说，为何焦虑症会与患有冠心病的病人发病风险有关系，这一问题一直以来还不清楚。

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Lead researcher Professor Tim Church said it was clear that inflammation played a key role in heart disease and other illnesses, but the factors which drove it were still relatively unclear.

首席研究员悌姆。邱尔却教授说，炎症在心脏病和其它疾病中起关键性的作用，这一点很清楚，但是引发炎症的因素相对还不是很清楚。

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The devices are used in a procedure called angioplasty, in which a balloon is snaked in through the leg and used to clear clogs in the arteries that feed the heart.

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