It often has no symptoms, but can lead to aortic ruptures which are fatal in 90 per cent of cases.

它经常毫无征兆，但是可以引起主动脉破裂，这在90%的案例中都是致命的。

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Volcano expert Juan Carlos Carrecedo said at the time: 'There is a ball of magma rising to the surface producing a series of ruptures which generate seismic activity.

火山专家胡安·卡洛斯·卡雷塞多当时说，“这是一团岩浆在向地面上升时造成地壳破裂，也就产生了这样的火山活动。”

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Such ruptures begin with aneurysms, which are weak spots in blood vessels in the brain.

破裂是从脑血管壁的疵点即动脉瘤开始的。

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These injuries, which may require treatment with ventilators or surgery for bowel ruptures, are caused by the rapid changes of pressure in explosions, before shrapnel even hits victims, he said.

WSJ: Injuries Resemble Traumas of War

So the medical examiner ruled that Khan had died of arterial sclerotic cardiovascular disease -- which encompasses incidents like heart attacks, strokes and aortic ruptures -- and that his manner of death was natural, according to Cina.

CNN: STORY HIGHLIGHTS