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Several common modes of operation present stimulation pulses solely when the patient's coronary heart does not beat by itself at a minimum rate. In such mode(s), the stimulation pulses are supplied solely when wanted, or "on demand", thereby preserving the limited energy supply of the implanted pacemaker for the longest potential time. If so, the basic pacing interval starts over, and no stimulation pulse is provided. If not, a stimulation pulse is supplied at the tip of the pacing interval. On this manner, the pacemaker's pacing interval defines the speed at which stimulation pulses are supplied to the guts in the absence of naturally occurring heart beats. It is noted that pacemakers may be employed that stimulate either, or each, chambers of the heart (i.e., both the suitable atrium and/or the right ventricle). That's, each particular person has occasions when his or her heart needs to beat quick, and times when his or her heart should beat slow.
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發表於 2025-9-30 20:27:08