Objective To evaluate the effect of percutaneous transluminal coronary balloon angioplasty (PTCA) andstent implantation on coronary flow reserve by using intracoronary Doppler flow velocity recording.

• 目的应用冠状动脉内多普勒血流速度描记技术，评价经皮冠状动脉球囊扩张术(PTCA)及支架植入术对冠脉血流储备的影响。