Toyama S, Suzuki K, Takahashi T, Yamashita Y
J Electrocardiol. 1985 Jul;18(3):277-85. doi: 10.1016/s0022-0736(85)80052-2.
It is useful to construct the epicardial isopotential mapping (the Ep Map) from the body surface isopotential mapping (the Body Map) for clinical diagnosis of cardiac disease, even though there are many unsolved problems in using the inverse solution. Yamashita et al. carried out this solution by using the finite element technique. In the present study, the clinical value of that method has been investigated in cases of myocardial infarction. The Ep Maps at 20, 25 and 30 msec. from the beginning of the QRS complex were obtained from the Body Map at the same time by using that method; the infarcted areas on the Ep Map were determined by using Toyama's method which was reported in a previous study. The infarcted area at 30 msec. on the Ep Map was located at the anterior wall along the ventricular septum in anterior infarction and at the posterior wall of the left ventricle in inferoposterior infarction. Patients were independently examined with the scintigram with thallium-201 and the infarcted area was coincident to the location of the abnormal findings of the scintigram. Moreover, the size of the infarcted area on the Ep Map and the size of the abnormal findings of the scintigram were parallel in most cases except one.
从体表等电位图（体表图）构建心外膜等电位图（心外膜图）对于心脏病的临床诊断是有用的，尽管在使用逆解时有许多未解决的问题。山下等人通过使用有限元技术实现了这种解决方案。在本研究中，已经在心肌梗死病例中研究了该方法的临床价值。通过使用该方法，同时从体表图获得QRS波群开始后20、25和30毫秒时的心外膜图；心外膜图上的梗死区域通过使用先前研究中报道的远山法来确定。心外膜图上30毫秒时的梗死区域在前壁心肌梗死时位于沿室间隔的前壁，在下后壁心肌梗死时位于左心室后壁。对患者独立进行了铊-201闪烁扫描检查，梗死区域与闪烁扫描异常发现的位置一致。此外，在心外膜图上梗死区域的大小与闪烁扫描异常发现的大小在大多数情况下（除一例之外）是平行的。
