MPS450
Operators Manual
2-16
Table 2-10. Numeric Codes for PVC-Waveform Settings
PVC-Waveform Setting
Numeric Code
PVC1 LEFT VENT
037
PVC1 LV EARLY
038
PVC1 LV R ON T
039
RIGHT VENT
040
PVC2 RV EARLY
041
PVC2 RV R ON T
042
Multifocal PVCS
A sequence that includes a left-focus PVC, followed by two normal beats, followed by a
right-focus PVC, followed by a normal rhythm at 80 BPM
Multifocal PVCs are premature ventricular contractions that originate in different
ectopic-pacemaker sites throughout the ventricles. These PVCs, which exhibit different
size and shape elements, are characterized by the absence of a P wave (due to the lack of
any atrial-pacemaker activity).
To simulate a multifocal-PVC condition, the MPS450 alternates the PVCs between type
1 (left focus) and type 2 (right focus), with a sequence occurring as a one-time event: a
left-focus PVC, followed by two normal beats, followed by a right-focus PVC, followed
by normal rhythm at 80 BPM.
Action in the Menu-Control Mode
1.
Press the top-menu key labeled
ARRHY
.
2.
Select
PREM
.
3.
Scroll to the LCD screen MULTIFOCAL PVCS.
4.
Select
RUN
. On the LCD screen, RUN flashes to indicate that the sequence for a
multifocal-PVC simulation is running as a one-time event. When the simulation
completes, the command INSRT displays on the screen.
5.
To repeat the sequence, select
INSRT
.
Alternatively, in the Numeric-Control Mode, press the number keys
043
, and select
RUN
. (To repeat the sequence, select
RUN
again.)
PVCS: 6, 12, or 24 Per Minute
PVCs scattered among normal beats AT 80 BPM, so that PVCs take place 6, 12, or 24
times every minute
.
Premature ventricular contractions may occur independently (even in healthy
individuals), as well as in groups and/or for a number of times every minute.
The MPS450 sets the number of PVCs that occur per minute during an otherwise-normal
sinus rhythm (80 BPM), to simulate conditions of six PVCs per minute, twelve PVCs per
minute, or twenty-four PVCs per minute. In this category the MPS450 simulates all
PVCs as type 1, left-ventricular focus, within a normal sinus QRS.
Action in the Menu-Control Mode
1.
Press the top-menu key labeled
ARRHY
.
2.
Select
VENT
to display the following LCD screen:
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