Lack of sleep has been associated with obesity, high blood pressure and heart attacks, among other nasty symptoms.

与睡眠缺乏有关的除其它讨厌的症状外，还有肥胖症、高血压和心脏病。

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But previous studies have linked noise to heart attacks and higher blood pressure, too-possibly due to increased stress and sleep disturbance.

但以前的研究显示，噪音和心脏病以及高血压也有关系——它可能会增加人们压力以及干扰睡眠。

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Irregular sleep patterns boost adrenaline levels, causing blood pressure to rise - which is a big risk factor for heart attacks.

不规律的睡眠会增加肾上腺素的分泌，导致血压升高——这是心脏病的一大诱因。

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One may be narcolepsy, those irresistible sleep attacks that can hit multiple times a day.

WSJ: Unraveling the Riddle of Too Much Sleep

Narcolepsy is a brain disorder characterised by sleep attacks and abnormal eye movement which affects up to one in a thousand people.

BBC: Pill to boost brain power

Dr Alistair Benbow, medical director of SmithKline Beecham, said that ropinirole was associated with sleepiness, but only in a tiny minority of patients, and that the company had never previously come across patients who experienced sudden sleep attacks.

BBC: Parkinson's patients face sleep danger