Objective:To assess the effects of different treatments when fractional flow reserve value of side branch was between 0.75-0.8 in coronary bifurcation lesions.Method:All 64 patients were divided into two groups:two stents strategy(two-stent group,n = 32) and or main branch crossover strategy(crossover group,n= 32).Major adverse cardiac events(MACE) were defined as primary endpoints in 12 months follow-up.Result:There was no difference in diameter[(3.44 ±0.78)mm vs(3.42 ± 0.56)mm,P = 0.91]and length[(27.71 ±...