After 6 months the results on 6-minute walk test ( 6-MWT ) were significantly different between the groups ( 435 m in the BMMNC and CABG group and 315 m in the CABG only group ; p = 0.001 ) , and continued to be preserved and improved on the final follow-up ( 520 m in the BMMNC and CABG group vs 343 m in the CABG only group ; p < 0.001 ) .