초록 ▼

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 a post-ventricular atrial refractory pe

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 a post-ventricular atrial refractory period (PVARP). 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 loss of atrial capture, a processor automatically records the atrial capture threshold, and restores the PVARP and the atrial pulse amplitude to their pre-test values. A pulse generator delivers a backup atrial stimulation pulse concurrently with a ventricular stimulation pulse, and the processor automatically initiates a premature ventricular contraction (PVC) response to reduce the possibility of a retrograde P-wave initiating a pacemaker-mediated tachycardia (PMT).

대표청구항 ▼

[ What is claimed is:] [19.]19. An implantable stimulation device for determining an atrial capture threshold and having a post-ventricular atrial refractory period (PVARP), comprising:a pulse generator for generating an atrial stimulation pulse while maintaining ventricular stimulation pulse amplit

[ What is claimed is:] [19.]19. An implantable stimulation device for determining an atrial capture threshold and having a post-ventricular atrial refractory period (PVARP), comprising:a pulse generator for generating an atrial stimulation pulse while maintaining ventricular stimulation pulse amplitude at a level known to ensure ventricular capture;detection circuitry coupled to the pulse generator for detecting loss of capture of the atrial stimulation pulse; anda processor, coupled to the pulse generator and the detection circuitry, in response to loss of atrial capture, for automatically adjusting the PVARP in response to loss of capture.