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A vertical line on the ECG that indicates the pacemaker has discharged
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Pacemaker spike
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A pacemaker malfunction that occurs when the artificial pacemaker fails to recognize spontaneous myocardial depolarization
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Undersensing
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A pacemaker malfunction that occurs when the artificial pacemaker stimulus is unable to depolarize the myocardium
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Failure to capture
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The period between two consecutive paced events in the same cardiac chamber
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Paced interval
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This type of pacemaker stimulates the atrium and ventricle
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Dual-chamber
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In dual-chamber pacing, the length of time between an atrial sensed or atrial paced event and the delivery of a ventricular pacing stimulus; an artificial or electronic PR interval
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AV interval
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This type of pacemaker continuously discharges at a preset rate regardless of the patient's intrinsic activity
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Fixed-rate
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Ability of a pacemaker to increase the pacing rate in response to physical activity or metabolic demand
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Rate modulation
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A pacemaker malfunction that results from inappropriate sensing of extraneous electrical signals
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Oversensing
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Power source that houses the battery and circuitry for regulating a pacemaker
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Pulse generator
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The rate at which the pacemaker's pulse generator initiates impulses when no intrinsic activity is detected; expressed in pulses per minute
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Basic rate
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The minimum amount of voltage (i,e., milliamperes) needed to obtain consistent capture
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Threshold
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Pacemaker response in which the output pulse is suppressed when an intrinsic even is sensed
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Inhibition
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A pacemaker malfunction that occurs when the pacemaker fails to deliver an electrical stimulus at its programmed
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Failure to pace
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