User's Manual

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About the Arrhythmia Analysis
Arrhythmia Analysis Flow
Learn
Waveform
QRS
Judgement
VPC?
Pattern Matching
VPC!
Arrhythmia
The arrhythmia detection algorithm learns the normal waveform of the patient and
compares the waveform (QRS pattern) and RR interval for each heartbeat to determine the
VPC. It compares the parameters such as QRS amplitude, QRS width, QRS polarity, RR
interval, and selects abnormal QRS. Then the QRS with suspected VPC is pattern
matched to distinguish the noise and VPC. This will finally determine the VPC and
generate the arrhythmia alarm.
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QRS Classification
Each heartbeat will be classified to the following patterns according to the QRS judgement.
N (Normal) Normal QRS beat
V (VPC) Ventricular Extrasystole
S (SVPC) Supraventricular Extrasystole
P (Pacing Beat) Pacing beat
F (Fusion Beat) Fusion beat of pacing and spontaneous beat
? (Undetermined Beat) Learning arrhythmia, or beat not matching the pattern
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Arrhythmia Type
With the above QRS judgement, the following 12 types of arrhythmia alarm can be generated.
Type Meaning Detection Criteria
ASYSTOLE Cardiac Arrest
Cardiac arrest is detected for more than
preprogrammed time.
VF Ventricular Fibrillation
A random, rapid electrical activity of the heart is
detected.
VT Ventricular Tachycardia
9 or more continuous ventricular beats are detected.
(HR: 140bpm / 120bpm or over)
SLOW_VT
9 or more continuous ventricular beats are detected.
(HR: under 140bpm / 120bpm)
TACHY Tachycardia HR is over the upper alarm limit.
BRADY Bradycardia HR is below the lower alarm limit.
RUN Consecutive VPC
Continuous VPC exceeding the preprogrammed
value is detected.
COUPLET
Couplet Ventricular
Extrasystole
2 continuous beats of VPC is detected.
PAUSE Cardiac arrest of 1.5 seconds and over is detected.
BIGEMINY Ventricular Bigeminy QRS pattern of V-N-V-N-V-N is detected.
TRIGEMINY Ventricular Trigeminy QRS pattern of V-N-N-V-N-N is detected.
FREQUENT Frequent VPC
VPC exceeding the preprogrammed value is
detected within 1 minute.
3
To Acquire ECG Waveform