Cohen D, Norman J C, Molokhia F, Hood W
Science. 1971 Jun 25;172(3990):1329-33. doi: 10.1126/science.172.3990.1329.
Magnetocardiograms with a bandwidth of 0 to 40 hertz were recorded from intact dogs undergoing myocardial infarction. This was done with a superconducting magnetometer in a magnetically shielded room. The purpose was to look for the steady currents of injury from the heart which supposedly produce much of the S-T segment shifts during infarction. These heart currents cannot be measured with surface electrodes because of direct-current interference from other sources, such as from the contact potential between electrode and skin. The magnetocardiograms showed both S-T segment shifts and direct currents as a result of infarction. However, they also showed that the S-T segment shifts were not produced by the direct currents. It is unlikely that these direct currents originated from the infarcted area, and their exact origin is not yet known.
从发生心肌梗死的完整犬只身上记录了带宽为0至40赫兹的磁心动图。这是在磁屏蔽室内使用超导磁力仪完成的。目的是寻找心脏损伤的稳定电流，据推测这些电流在梗死期间会产生大部分S-T段偏移。由于来自其他来源的直流干扰，如电极与皮肤之间的接触电位，这些心脏电流无法用表面电极测量。磁心动图显示梗死导致了S-T段偏移和直流电流。然而，它们也表明S-T段偏移不是由直流电流产生的。这些直流电流不太可能起源于梗死区域，其确切来源尚不清楚。
