Page 133 - Control Theory in Biomedical Engineering

118 Control theory in biomedical engineering

Table 2 Adjusted operators.
Designation Operators
Conjunction Product
Disjunction Sum
Implication Product

Table 3 State of the inputs for each arrhythmia class.
Arrhythmia E1 (bpm) E2 (mv) E3 (ms) E4 (ms) E5 (ms) E6 (ms)

N 60–100 0.05–2.5 120–200 80–120 60–120 80–120
PVC <60 <0.05 – >120 – –
P 60–100 – – >120 >280 –
RBBB <60 >2.5 120–200 >120 – >120
LBBB <60 <0.05 120–200 >120 – –

“–” indicates there is no feature information.

Table 4 Linguistic rule base.
Fuzzy rule Output
If the heart rate is MOY AND the amplitude P is MOY AND NSR
The duration of the PR interval is MOY AND the duration
of the QRS complex is MOY AND the duration of the
RR interval is MOY AND the duration of the ST interval
is MOYTHEN
if the heart rate is MIN AND the amplitude P is MIN AND PVC
the duration of the QRS complex is MAX AND the
duration of the RR interval is MAX THEN
If the heart rate is MOY AND the duration of the QRS P
complex is MAX AND the duration of the RR interval
is MAX THEN
If the heart rate is MIN AND the amplitude P is MAX AND RBBB
the duration of the PR interval is MOY AND the duration
of the QRS complex is MAX AND the duration of the ST
interval is MAX THEN
If the heart rate is MIN AND the amplitude P is MIN AND LBBB
the duration of the PR interval is MOY AND the duration
of the QRS complex is MAX THEN