St. Jude Medical Merlin PSA EX3100, Help Manual

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Merlin™ PSA Help Manual 8-3
Figure 8-3. DOO Mode timing diagram
VDD
(Ventricular Pacing; Dual-Chamber Sensing and Inhibition; Atrial Tracking)
The VDD mode is a dual-chamber, atrial-tracking mode with no atrial output in which ventricular pac-
ing is synchronized to intrinsic atrial activity. The device senses in the atrium and ventricle(s) but only
paces in the ventricle(s).
Figure 8-4. VDD Mode timing diagram
A
V
Programmed Rate Programmed Rate
AV Delay
Output Pulse
AP AP AP
VP VP VP
V
AV Delay
Refractory Period
Alert Period
Output Pulse
A
Sensed Event
Programmed Rate
PVARP
AS
VP VP VS VS
AS