{HEAD ~ The wire frame structure} may be compressed into {TAIL ~ a small diameter configuration} to fit within the distal tip of a delivery catheter 
{ HEAD ~ The wire frame structure } may be compressed into { TAIL ~ a small diameter configuration } to fit within the distal tip of a delivery catheter
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH