求翻译：由于脂质代谢异常，血液中的脂质沉着在原本光滑的动脉内膜上，在动脉内膜一些类似粥样的脂类物质堆积而成白色斑块，这些斑块渐渐增多造成动脉腔狭窄，使血流受阻，导致心脏缺血，产生心绞痛。如果动脉壁上的斑块形成溃疡或破裂，就会形成血栓，使整个血管血流完全中断，发生急性心肌梗死，甚至猝死。冠心病的少见发病机制是冠状动脉痉挛（血管可以没有粥样硬化），产生变异性心绞痛，如果痉挛超过30分钟，也会导致急性心肌梗死（甚至猝死）。是什么意思？

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Because of the lipid metabolism abnormalities in the blood, calm in the original lipids smooth arterial film on the arterial film some similar atherosclerosis is in lipids material buildup and white plaque of the plaque, which caused by increasing gradually narrow the arterial cavity blood flow is b

Is unusual as a result of the lipin metabolism, in the blood lipin calm in originally the smooth artery internal membrane, becomes the white mottling in the artery internal membrane some similar gruel type fats material stack, these mottlings increase gradually create the artery cavity to be narrow,

Due to the abnormal lipid metabolism, lipid deposition in the blood in the original smooth on the intima, intima similar porridge-like accumulation of lipids and white plaques, plaque arterial stenosis caused by gradually increased, so that the blood flow is blocked, leading to ischemia of the heart

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