| 摘要 |
A pacer for cardiac pacing and condition monitoring in which the electrical characteristics of the pacer are altered upon a temporary or permanent charge in monitored conditions, such as the failures defined in a "loss of capture" or a "failure to sense", in which the timed relationship between the pacer signal generator and the cardiac signal is monitored to indicate detection of failure condition. The monitor acts to provide both increased stimulus to recover capture and to provide warning pulses indicating loss of capture or failure to sense, which are sufficiently discernible upon an electrocardiogram to enable later diagnosis, even after self-correction. An additional means for improving the ability of the pacemaker to "pick up" and amplify spontaneous cardiac signals is provided by redundant signal amplifiers which are checked against each other. These circuits and their ability to detect improper recycling are used to indicate a "sensing failure".
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