冠脈循環

coronary circulation

surname Guan

hat / crown / crest / cap

to put on a hat / to be first / to dub

coronary / coronary artery

arteries and veins / vein (on a leaf, insect wing etc)

see 脈脈|脉脉[mo4 mo4]

to follow / to adhere to / to abide by

to cycle / to circulate / circle / loop

surname Huan

ring / hoop / loop / (chain) link / classifier for scores in archery etc / to surround / to encircle / to hem in