An exemplary method includes delivering a maintenance therapy that aims to
prevent occurrence of apnea, sensing information, based at least in part
on the information, determining if apnea exists and, if apnea exists,
delivering a termination therapy that aims to terminate the apnea. An
exemplary implantable device includes an input for information pertaining
to respiration and control logic to call for overdrive pacing at a first
rate that aims to minimize occurrence of a respiratory condition, to
analyze the information for occurrence of the respiratory condition and,
upon occurrence of the respiratory condition, to call for overdrive
pacing at a higher rate. Other exemplary methods, devices, systems, etc.,
are also disclosed.