Acute pericarditis generally lasts just a few weeks, whereas chronic pericarditis lasts longer, usually more than 6 months.
急性心包炎通常持续数周时间，而慢性心包炎持续时间较长，大于6个月。
Acute pericarditis
原声例句
Osmosis-心血管
Osmosis-心血管
Now, the cause of acute pericarditis is usually idiopathic, meaning that we don't know what causes it.
急性心包炎通常是特发性的；特发性指原因不明。
中文百科
急性心包炎
急性心包炎（acute pericarditis）指的是各种原因引起的心包脏层和壁层的急性炎症。“急性”指的是持续时间不超过6个月。
由于心包脏层即为心外膜，所以，也可称为急性心外膜炎。心外膜的炎症时常波及其下的心肌，如果其下的心肌明显受累时，可称为心肌心包炎（myopericarditis）。同样，如果心包的炎症明显累及心脏周围组织，可以相应命名，如纵隔心包炎（medianstinopericarditis）。
英语百科
Acute pericarditis 急性心包炎
Acute pericarditis is a type of pericarditis (inflammation of the sac surrounding the heart, the pericardium) usually lasting less than 6 weeks. It is by far the most common condition affecting the pericardium.
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