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目的探讨心磁图对老年冠心病患者的诊断及介入治疗后的随访价值。方法应用德国SQUID7通道非屏蔽心磁图仪,因胸闷入院进行冠状动脉造影的老年患者90例,分为对照组(44例,冠状动脉病变<50%)和冠心病组(46例,至少1支冠状动脉病变≥70%)。冠心病组患者31例按时完成3次检测。选择心脏复极过程,以每12ms为间隔作出ST-T间期的电流密度分布图,以每幅图分级的平均数(ACTM)、异常电流分布图占所有电流密度分布图的比率(RAM)作为判断标准。结果冠心病组ACTM(3.04±0.64vs2.72±0.82,P<0.05)和RAM[(65.28±31.50)%vs(50.84±36.26)%,P<0.05]明显高于对照组。支架治疗后24~72hACTM、RAM较介入治疗前有所改善,但差异无显著性意义;介入治疗后1个月ACTM、RAM改善明显,差异有显著性意义。结论心磁图是一种无创性的、敏感性较高的筛选冠心病的新方法。同时是一种随访治疗效果和预后的简易方法。
Objective To investigate the diagnostic value of magnetic resonance imaging (MR) in elderly patients with coronary heart disease and the follow-up value after interventional therapy. Methods 90 patients with coronary artery angiography admitted to the hospital due to chest tightness were divided into control group (44 cases, coronary artery disease <50%) and coronary heart disease group (46 cases, at least 1 Coronary artery disease ≥ 70%). 31 cases of coronary heart disease patients completed on time 3 tests. Select the heart repolarization process, every 12ms interval ST-T interval current density distribution chart, the average number of each chart classification (ACTM), the abnormal current distribution of all the current density distribution ratio (RAM) As a criterion. Results ACTM (3.04 ± 0.64vs2.72 ± 0.82, P <0.05) and RAM [(65.28 ± 31.50)% vs (50.84 ± 36.26)%, P <0.05] in CHD group were significantly higher than those in control group. The ACM and RAM of 24 ~ 72h after stent treatment were improved compared with those before interventional treatment, but the difference was not significant. ACTM and RAM improved significantly at 1 month after interventional treatment, the difference was significant. Conclusion Magnetoencephalography is a noninvasive and sensitive method of screening coronary heart disease. At the same time is a simple method of follow-up treatment and prognosis.