A<unk>  or<unk><unk>  is defined as: 
1. The appearance of<unk>  grade ≥2 during a PCI procedure that was not present at baseline; 
2. A qualitative increase of baseline<unk>  during a PCI procedure;
3. Presence of<unk>  at baseline that improves during a PCI procedure only to worsen later:
For example, a<unk>  of grade 5 is present at baseline.  During the PCI procedure, the<unk>  grade improves to 2 however at the end of the procedure, the<unk>  grade worsens to 4.  This example will qualify as a “New or<unk><unk> ”.
PCI complications: new or enlarging thrombus
PCI complications: slow flow
PCI complications: loss of side branch
PCI complications: peri procedure bleeding
PCI complications: multiple complications
PCI complications: vessel perforation
PCI complications: dissection
PCI complications: distal embolization