The work of {HEAD ~ the heart} is decreased and coronary blood flow is increased to promote {TAIL ~ the formation} of new coronary collateral channels and the perfusion of the heart itself 
The work of { HEAD ~ the heart } is decreased and coronary blood flow is increased to promote { TAIL ~ the formation } of new coronary collateral channels and the perfusion of the heart itself
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH