Cardiac Functions
Arrhythmia Functions
2
2-13
RUN
.
Paroxysmal Atrial Tachycardia (PAT)
Normal rhythm at alternating rates
.
When atrial tachycardia occurs as a seizure-like spasmodic event, it is called paroxysmal
atrial tachycardia or PAT. PATs typically start and stop suddenly, initiated by a
premature atrial contraction (PAC). PAT spasms may last for only a few seconds or for
minutes or hours. A patient may experience ATs and PATs over the course of many
years.
The MPS450 simulates PAT at alternating rates: 160 BPM for five seconds and 80 BPM
for twelve seconds.
Action in the Menu-Control Mode
1.
Press the top-menu key labeled
ARRHY
.
2.
Select
SV
.
3.
Scroll to the LCD screen PAROXYSMAL ATR TACH.
4.
Select
RUN
. The PAT simulation runs continuously (repeats) until another
arrhythmia selection is made.
Alternatively, in the Numeric-Control Mode, press the number keys
382
, and select
RUN
.
Nodal Rhythm
Normal rhythm, but with a P wave that originates in the AV node, and a P-R interval that
is very short
.
Nodal rhythm, also referred to as junctional rhythm or junctional escape, is a condition
where the predominant pacemaker is the AV node rather than the SA node.
The MPS450 simulates nodal rhythm with a very short P-R interval of 90 ms.
Action in the Menu-Control Mode
1.
Press the top-menu key labeled
ARRHY
.
2.
Select
SV
.
3.
Scroll to the LCD screen NODAL RHYTHM.
4.
Select
RUN
. The nodal-rhythm simulation runs continuously (repeats) until another
arrhythmia selection is made.
Alternatively, in the Numeric-Control Mode, press the number keys
018
, and select
RUN
.
Supraventricular Tachycardia
Normal rhythm at a faster-than-normal rate of 200 BPM
.
Supraventricular tachycardia is a combination of a junctional tachycardia (that is, an
atrial tachycardia occurring in the AV or junctional node) and an atrial tachycardia.
Therefore, supraventricular tachycardia encompasses multifocal, ectopic, atrial
pacemakers in and around the AV node above the bundle of His.
The MPS450 simulates a condition of supraventricular tachycardia at 200 BPM.
Action in the Menu-Control Mode
1.
Press the top-menu key labeled
ARRHY
.
2.
Select
SV
.
Summary of Contents for Biomedical MPS450 Operators
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