| 摘要 |
A pacemaker programmer and diagnostic system retrieves information stored within a pacemaker and analyzes the retrieved data in real time. The stored information can be retrieved by means of a telemetry communication link. The pacemaker automatically lengthens an AV delay. The pacemaker determines atrial capture by generating atrial stimulation pulses while maintaining the ventricular stimulation pulse amplitude at a level known to ensure ventricular capture, and by detecting loss of atrial capture. In response to the loss of atrial capture, a processor automatically records the atrial capture threshold, and restores the AV delay to its pre-test value. The pulse generator also delivers a backup atrial stimulation pulse concurrent with a ventricular stimulation pulse to reduce the possibility of a retrograde P-wave initiating a pacemaker-mediated tachycardia (PMT).
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