No statistical difference was observed between the two groups in TIMI flow before [ grade 0 : 18 ( 34.6 % ) vs 19 ( 36.5 % ) , grade 3 : 28 ( 53.8 % ) vs 27 ( 51.9 % ) ] and after PCI [ grade 3 : 52 ( 100.0 % ) vs 51 ( 98.1 % ) ] .