Fluke Biomedical MPS450 - Manual (Page 43)

Cardiac Functions
Arrhythmia Functions
2
2-11
gje016.eps
3. Scroll to the LCD screen for the desired condition: ATRIAL FIB COARSE or
ATRIAL FIB FINE.
4. Select RUN. The selected simulation runs continuously (repeats) until another
arrhythmia selection is made.
Alternatively, in the Numeric-Control Mode, press the number keys for atrial-fibrillation
amplitude according to Table 2-9, and select RUN:
Table 2-9. Numeric Codes for Atrial-Fibrillation-Amplitude Settings
Atrial-Fibrillation-Amplitude Setting Numeric Code
ATRIAL FIB COARSE 012
ATRIAL FIB FINE 013
Atrial Flutter
A repeating sequence of large, irregular P waves at 300 BPM; an irregular ventricular
response.
Atrial flutter occurs when a single, ectopic, atrial pacemaker that is non-SA (usually low,
near the AV node) fires repeatedly and (usually) regularly, producing large, pointed P
waves at an approximate rate of 400 BPM (between 240 and 480 BPM). Not all of the
atrial impulses conduct through to the ventricles. On the ECG readout the waveform
generally exhibits a “saw tooth” appearance. This type of arrhythmia can reduce cardiac
output by as much as 25 %, due in many cases to the lack of an atrial “kick” and the
accompanying failure of the ventricles to fill completely with blood prior to ventricle
contraction.
The MPS450 simulates atrial flutter in the following (repeating) sequence: beats at a ratio
of 5:1 (five atrial beats for every one ventricular beat) for twelve seconds, followed by
beats at a ratio of 3:1 for six seconds, followed by beats at a 2:1 ratio for six seconds.
Action in the Menu-Control Mode
1. Press the top-menu key labeled ARRHY.
2. Select SV.
3. Scroll to the LCD screen ATRIAL FLUTTER.
4. Select RUN. The atrial-flutter simulation runs continuously (repeats) until another
arrhythmia selection is made.
Alternatively, in the Numeric-Control Mode, press the number keys 014, and select
RUN.
Sinus Arrhythmia
Beats that are normal, but triggered at an irregular rate, from 60 BPM to 100 BPM.
Sinus arrhythmia occurs when the SA node paces the heart irregularly. Typically, the
heartbeat increases with each intake of breath and decreases with each exhalation (a