Fluid flow is directed to the second chamber during cardiac diastole and away from the second chamber during cardiac systole, causing {HEAD ~ the device} to function in {TAIL ~ a counterpulsation mode} 
to function in
Fluid flow is directed to the second chamber during cardiac diastole and away from the second chamber during cardiac systole , causing { HEAD ~ the device } to function in { TAIL ~ a counterpulsation mode }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL