DOO Mode
When pacing in the A-V sequential asynchronous mode (DOO), the pacemaker will pace
the atrium and the ventricle asynchronously at the programmed base rate
and with the
programmed A-V interval
.
Both channels are continuously blanked.
When the V-A interval times out, the pacemaker will:
•
Start the A-V INTERVAL
,
and
•
Deliver a pacing stimulus in the atrium.
•
When the A-V interval
times out, the pacemaker will deliver a pacing stimulus in the
ventricle.
DVI Mode
In the Ventricle demand A-V sequential (DvI) mode there is no atrium sensing function.
If a ventricle event is sensed outside of a refractory period, the pacemaker restarts the V-
A interval. If ventricle event is sensed during AV interval then
the pacemaker inhibits the
ventricle stimulus.
Note:
PVARP
and
UPPER RATE
do not apply in this mode.
DDD Mode
This mode provides a P-wave synchronous rate response with AV sequential pacing.
Intrinsic activity in the atrium and ventricle inhibits output stimuli. Without atria events
within certain periods, the pacemaker delivers a pacing stimulus to the atrium at the end
of the V-A interval which is equal to the programmed base rate
minus the programmed
A-V INTERVAL.
Without ventricular activity during certain periods, the pacemaker
delivers a pacing stimulus to the ventricle at the end of the programmed
A-V
INTERVAL.
The pacing rate can be limited by the
UPPER RATE
SO that the
pacemaker does not pace the ventricle too fast in the presence of atria arrhythmias. When
pacing in the DDD mode, the pacemaker will pace the atrium and the ventricle at the
programmed base rate
and with the programmed A-V interval in the absence of detected
atria or ventricular intrinsic events.
VDD Mode
This mode does not provide stimuli to the atria. It senses the atral intrinsic activity, and
pacemaker will deliver ventricle pacing stimulus at the end of the programmed
A-V
INTERVAL.
This mode provides a P-wave synchronous rate response with AV
sequential pacing. Intrinsic activity in the atrium and ventricle inhibits output stimuli.
Summary of Contents for ZEUS-1
Page 7: ...ZEUS 1 ...
