Boudík F, Stojan M, Anger Z, Aschermann M, Vojácek J, Stovícek P
2nd Department and Cardiology Laboratory, 1st Faculty of Medicine, Charles University Hospital, Prague, Czech Republic.
Can J Cardiol. 1996 Aug;12(8):745-9.
To assess the progress of chronic myocardial ischemia after successful percutaneous transluminal coronary angioplasty (PTCA) using body surface potential mapping (BSPM).
For BSPM analysis the following kinds of maps were used: isopotential repolarization maps corresponding to 70% of ST-T interval's duration and isointegral maps corresponding to 0% to 20% of ST-T duration. BSPM measurements were taken before the PTCA and usually one to six days after this intervention. In 17 patients BSPM was carried out within two days after PTCA. Eleven to 14 BSPM examinations were usually carried out during six months of follow-up. Control coronary angiography was performed after six months in all but three patients.
Substantial focal decrease of positive potential in repolarization caused by myocardial ischemia recovered gradually after successful PTCA. This appeared to be caused by the regression of "hibernating myocardium'. An increase of positive potential was statistically significant (P < 0.01) after the fifth week of PTCA intervention. There was a positive correlation between BSPM findings and chest discomfort of patients after PTCA. Chronic myocardial ischemia could be observed on isopotential and/or isointegral maps examined before the PTCA in 21 of 25 cases (sensitivity 84%).
使用体表电位标测（BSPM）评估经皮腔内冠状动脉成形术（PTCA）成功后慢性心肌缺血的进展情况。
进行BSPM分析时使用了以下几种标测图：对应于ST-T间期持续时间70%的等电位复极标测图和对应于ST-T持续时间0%至20%的等积分标测图。在PTCA之前以及通常在该干预后1至6天进行BSPM测量。17例患者在PTCA后两天内进行了BSPM检查。在随访的6个月期间通常进行11至14次BSPM检查。除3例患者外，所有患者在6个月后均进行了对照冠状动脉造影。
成功PTCA后，由心肌缺血引起的复极过程中正电位的显著局灶性降低逐渐恢复。这似乎是由“冬眠心肌”的消退所致。PTCA干预第5周后正电位增加具有统计学意义（P < 0.01）。PTCA后患者的BSPM结果与胸部不适之间存在正相关。在25例病例中的21例（敏感性84%）PTCA之前检查的等电位和/或等积分标测图上可观察到慢性心肌缺血。
