Through the experiment , it is found that , when the compression percentage closes to 20 % , the compression pressure at the far end changes quickly and differs from that at the near end ; and when the compression percentage is less than 20 % , the compression pressure at the near end rises quickly and that at the far end transits from instability to reverse distribution state 實驗研究表明,冠狀動脈面積收縮接近到原來的20 %時,遠段收縮壓迅速與近段收縮壓分離;當冠狀動脈面積收縮到小于原來的20 %時,近段收縮壓迅速上升,遠段壓力從不穩(wěn)定狀態(tài)迅速過渡到收縮壓呈反向分布狀態(tài)。