（图片来源：New England Journal of Medicine）
A 36-year-old man was admitted to the intensive care unit with an acute exacerbation of chronic heart failure. His medical history included heart failure with an ejection fraction of 20%, bioprosthetic aortic-valve replacement for bicuspid aortic stenosis, endovascular stenting of an aortic aneurysm, and placement of a permanent pacemaker for complete heartblock. An Impella ventricular assist device was placed for management of acute heart failure, and a continuous heparin infusion was initiated for systemic anticoagulation.
During the next week, the patient had episodes of small-volume hemoptysis, increasing respiratory distress, and increasing use of supplemental oxygen (up to 20 liters delivered through a high-flow nasal cannula). During an extreme bout of coughing, the patient spontaneously expectorated intact cast of the right bronchial tree. The right bronchial tree consists of three segmental branches in the upper lobe (blue arrows), two segmental branches in the middle lobe (white arrows), and five segmental branches in the lower lobe (black arrows). The patient’s trachea was subsequently intubated, and flexible bronchoscopy revealed a small amount of blood in the basilar branches of the right lower lobe.
The patient was extubated 2 days later and had no further episodes of hemoptysis. One week after extubation, he died from complications of heart failure (volume overload and poor cardiac output) despite placement of the ventricular assist device.
intensivecare unit 重症监护室
completeheart block 完全性心室传导阻滞
high-flownasal cannula 高氧流量鼻导管通气
exacerbation："exasperate, irritate, provoke," from ex, here probably "thoroughly" (see ex-),+ acerbus"harsh, bitter,“
Prosthesis："addition of a letter or syllable to a word", from pros "to" (from PIE root *per-(1) "forward," hence "in front of, toward, near") + tithenai" to put, to place,"
Aorta:"main trunk of the arterial system,"
Heparin: substance found in the liver, lungs and other tissues. Hepar-: liver
coagulation:①"act of changing from a fluid toa thickened state,";②Meaning"mass or quantity of coagulated matter" is from 1660s.
Expectorated:"to clear out the chest or lungs,"from ex"out" (see ex-)+ pectus(genitive pectoris)"breast" (see pectoral(adj.))
测试：Translate the following words into CHINESE
bicuspid aortic stenosis