Jain A
Department of Medicine, UTHSC-San Antonio 78284, USA.
Cardiology. 1997 Nov-Dec;88(6):533-9. doi: 10.1159/000177405.
We evaluated the functional significance of angiographically successful percutaneous transluminal coronary angioplasty (PTCA) in 50 patients before and after PTCA using an atrial pacing stress test. Before balloon angioplasty, 40/50 patients had transient ST-segment changes on the intracoronary (IC) ECG. After PTCA 14/50 patients continued to have ischemic changes on IC-ECG. Atrial pacing stress tests can be performed easily in the cardiac catheterization laboratory. Despite angiographically successful dilatation, 28% of the patients have inducible ischemia indicating functionally inadequate dilatation. Inadequate functional dilatation may contribute to early return of symptoms in some patients.
我们采用心房起搏负荷试验，对50例患者经皮腔内冠状动脉成形术（PTCA）血管造影成功前后的功能意义进行了评估。在球囊血管成形术前，50例患者中有40例在冠状动脉内（IC）心电图上出现短暂性ST段改变。PTCA术后，50例患者中有14例在IC心电图上仍有缺血性改变。心房起搏负荷试验可在心脏导管实验室轻松进行。尽管血管造影显示扩张成功，但28%的患者仍有可诱导的缺血，提示功能扩张不足。功能扩张不足可能导致部分患者症状早期复发。
