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