Fig. 4

Flow rate changes of popliteal artery (a), posterior tibial artery (b), anterior. tibial artery (c) and dorsalis pedis artery (d) before and after intervention in EECP, ISRT and control groups (“*” indicates the significant comparison within each group. “*” and “**” denote p < 0.5 and < 0.01 respectively. “+” and “++” denote p-values of the difference between groups < 0.5 and < 0.01 respectively).