Cardiac Functions
Arrhythmia Functions
2
2-15
3.
Scroll to the LCD screen NODAL PAC.
4.
Select
RUN
. On the LCD screen, RUN flashes to indicate that the PNC simulation is
running as a one-time event. When the simulation completes, the command
INSRT
displays on the screen.
5.
To send another PNC simulation, select
INSRT
.
Alternatively, in the Numeric-Control Mode, press the number keys
036
, and select
RUN
. (To repeat a PNC, select
RUN
again.)
Premature Ventricular Contractions
Six PVC-type selections of focus and timing:
•
a left-focus premature ventricular beat with standard timing, 20 % premature;
•
a left-focus premature ventricular beat with early timing, 33 % premature;
•
a left-focus premature ventricular beat with very early timing, 65 % premature,
which starts during the T wave of the previous beat;
•
a right-focus premature ventricular beat with standard timing, 20 % premature;
•
a right-focus premature ventricular beat with early timing, 33 % premature; or
•
a right-focus premature ventricular beat with very early timing, 65 % premature,
which starts during the T wave of the previous beat.
A premature ventricular contraction or PVC is an extra beat consisting of an abnormally
wide and unusual QRS complex originating in an ectopic pacemaker in the ventricles.
Early ventricular PVCs occur close to the preceding beat. Moreover, R-on-T PVCs,
which are characterized by a beat that falls on the T wave of the preceding QRS-T
complex, are especially inauspicious because of their potential to cause ventricular
tachycardia or ventricular fibrillation.
The six PVC selections offered by the MPS450, occurring as one-time events within a
normal sinus rhythm, enable the focus or type of the simulated PVC (left or right
ventricle) to be specified, as well as the timing (standard, early, or R on T). “Type 1”
refers to a PVC with a left-ventricular focus and a marked left-axis deviation, while
“type 2” refers to a PVC with a right-ventricular focus and a right-axis deviation. The
MPS450 simulates “standard” PVCs as 20 % premature, “early” PVCs as 33 %
premature, and R-on-T PVCs as 65 % premature.
Action in the Menu-Control Mode
1.
Press the top-menu key labeled
ARRHY
.
2.
Select
PREM
.
3.
Scroll to the LCD screen for the desired PVC focus: PVC1 LEFT VENT; PVC1 LV
EARLY; PVC1 LV R ON T; PVC2 RIGHT VENT; PVC2 RV EARLY; or PVC2
RV R ON T.
4.
Select
RUN
. On the LCD screen, RUN flashes to indicate that the selected simulation
is running as a one-time event. When the simulation completes, the command
INSRT
displays on the screen.
5.
To repeat a PVC with the same focus, select
INSRT
.
Alternatively, in the Numeric-Control Mode, press the number keys for a PVC-waveform
type according to Table 2-10, and select
RUN
. (To repeat the selected PVC, select
RUN
again.)
Содержание Biomedical MPS450 Operators
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