用冠脉内心电图监测PTCA期间心肌缺血的变化

Intracoronary monitoring of myocardial ischemia during percutaneous transluminal coronary angioplasty

记录23例冠心病患者经皮冠状动脉腔内成形术（PTCA）时体表心电图（S-ECG）和单极冠状动脉内心电图（IC-ECG）发现，前者显示ST段抬高14例（61％），而后者显示ST段抬高ZI例（91％）。IC-ECG显示，随球囊充盈次数增加，其ST段抬高幅度逐渐减低。因此，PTCA期间作IC-ECG监测对检出心肌缺血和估价预适应，具有一定的临床价值。

In 23 patients with coronary artery disease, both body surface (S-ECG) and intracoronary electrocar-diograms (IC-ECG ) were recorded during percutaneous transluminal coronary angioplasty (PTCA). Myocardial is-chemia ST segment elevation was detected by S-ECG in l4 patients (61 % ) and by IC-ECG in 21 patients (91 %). TheIC-ECG recording showed progressive reduction in the magnitude of ST elevation during subsequent balloon inflations,whereas ST segment was not significant1y a1tered in S-ECG. Thus, IC-ECG is more useful than conventional S-ECG inthe evaluation of myocardia1 ischemia and ischemia preconditioning during PTCA.