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Before Mr Larsson received his implantable device, patients had received pacing from huge external devices.
在拉森之前的很多病人通过巨大的外部设备调节心律。
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Objective To explore influence of external and internal cardioversion on pacing threshold of permanent pacemaker.
目的探讨体外及心内心脏电击转复对永久起搏器起搏阈值的影响。
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