外监护。通过集中超声波束于胎儿心脏来描记胎心率，胎儿监护翻译多普勒信号。

B. External fetal monitoring. The FHR is measured by focusing an ultrasound beam on the fetal heart. The fetal monitor interprets Doppler signals.

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讨论了远程心电监护系统中的信号采集电路设计的关键技术。提出了特色鲜明的具体实现方案。

This paper discusses the key technologies for the design of signal collection circuit in distant electrocardiogram monitoring system, and presents an idiographic actualizing scheme.

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该装置对研制心律失常监护器是十分有用的，因为由它引出的心电信号，其心率和心律失常的出现均可调整和控制。

The ECG simulator is very useful in the development of an arrhythmia monitor, because the heart rate and occurrence of arrhythmia could be controlled.

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