Medtronic PROTECTA XT DR D314DRG, Clinician Manual

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7.11.2 Operation of NCAP
NCAP is available when the pacing mode is programmed to DDDR, DDD, DDIR, DDI or an
MVP mode (AAIR<=>DDDR or AAI<=>DDD), and functions when the device is operating
in one of these modes.
Whenever an atrial refractory sense occurs, the device starts a programmable NCAP
interval. If an atrial pace is scheduled to occur during the NCAP interval, the atrial pace is
delayed until the NCAP interval expires. When an atrial pace is delayed by the NCAP
feature, the AP-VP interval decreases (but not less than 30 ms). After NCAP decreases the
AP-VP interval, some variation in the VP-VP interval may occur. These variations only affect
the current and next ventricular interval.
The NCAP interval is 400 ms for 1 pacing cycle whenever a PVC Response or a PMT
Intervention occurs.
Figure 110. Operation of NCAP
A
P
A
R
V
P
V
P
V
P
V
P
V
P
V
P
200 ms
A
P
A
P
A
P
A
P
A
P
ECG
Marker Channel
NCAP interval
AP-VP interval
1 The device is pacing at an elevated rate.
2 An atrial refractory sense occurs, starting an NCAP interval (300 ms in this case).
3 After the NCAP interval, the device paces the atrium and then paces the ventricle after a
shortened AP-VP interval.
7.11.3 Programming NCAP
Select Params icon
⇒ Pacing…
⇒ Additional Features…
▷ Non-Comp Atrial Pacing
▷ NCAP Interval
Medtronic PROTECTA™ XT DR D314DRG
Clinician Manual 267