Case 9 Basic IPG timing is A-A, but after a (pacemaker-defined) PVC, it switches to V-V timing.
{"Image DocumentName": "Case 9Basic IPG timing is A-A, but after a (pacemaker-defined) PVC, it switches to V-V timing.", "Image ImageDescription": "This maintains a stable V-V interval (at the lower or sensor indicated rate, whichever is faster and depending on the mode) The resulting AS-AP interval may exceed LRL and is noted in the histogram. DDDR 60/ ms. Student Notes. The pacemaker is designed to try to provide a stable ventricular rate. So in the presence of a PVC, the pacemaker is designed, in effect, to provide a compensatory pause. However, this pause, which occurs as a result of A-A timing, then V-V timing, can also result in a prolonged V-A interval. This interval is noted in the histograms. Thus, this is really a normal (but confusing) operation. Instructor Notes.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}