冠状循环 meaning in English

coronary circulation
◇冠状循环衰竭[医学] coronary failure; coronary circulatory failure

How hdl can protect the coronary circulation is not as yet firmly established .
HDL究竟如何保护冠状循环，迄今还没有肯定的解答。
The blood vessels are in general dilated, although the cornary and pulmonary circulation may show the opposite response .
血管一般是扩张的，但冠状循环和肺循环的血管则可出现收缩。
How hdl can protect the coronary circulation is not as yet firmly established
Hdl究竟如何保护冠状循环，迄今还没有肯定的解答。