Voo; Aai - Abbott Merlin PSA EX3100 Help Manual

VOO

(Ventricular Asynchronous Pacing)
In VOO mode, the device paces the ventricle(s) at the programmed rate regardless of the intrinsic
rhythm.
CAUTION: VOO mode is primarily intended for temporary use. Long-term use may
result in competitive pacing, which may induce potentially dangerous
tachyarrhythmias.
Figure 14. VOO Mode timing diagram

AAI

(Atrial Pacing, Sensing, and Inhibition)
In AAI mode, the device paces the atrium at the programmed rate if the atrial events are not
sensed. If the device detects a sensed event during the alert period, it withholds the pulse and
resets the timing to the start of the Atrial Refractory Period.
Figure 15. AAI Mode timing diagram
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