During the 48 months of follow-up, low expression of B2 receptor on circulating CD34-positive cells indicates the high incidence of heart failure (hazard ratio: 2.247; 95% confidence interval: 1.110-4.547; P = 0.024) and revascularization (hazard ratio: 2.335; 95% confidence interval: 1.075-5.074; P = 0.032). Here, CD34 is linked to heart failure.