Biomedical Engineering Reference
In-Depth Information
Right Bundle Branch Block (RBBB)
QRS duration
120 ms.
M-shaped complex in V1 and V2.
Slurred S-wave in leads I, V5, V6; and an S-wave that is of greater amplitude
(length) than the preceding R-wave.
The event PR_Test is used to capture the PR interval in the ECG signal, and to
assess the first degree AV block. A set of guards of this event states that the current
PR interval is within the range of 120 ms to 220 ms, and it is greater than 200 ms,
sinus rhythm is Ye s , and the heart is in abnormal state.
EVENT PR _ Te s t
ANY pr
WHERE
grd1
:
pr
120 .. 220
grd2
:
pr > 200
grd3
:
Sinus
=
Ye s
grd4
:
Heart _ State
=
KO
THEN
act1
:
PR _ Int
:=
pr
act2
:
Disease _ step 2
:=
First _ degree _ AV _ Block
END
The event QRS_Test_LBBB is used to diagnose left bundle branch block through
testing of QRS-wave. This event refines QRS_Test. The guards of this event state
that the current QRS interval is within the range of 50 ms to 150 ms, and it is greater
than or equal to 120 ms, sinus rhythm is Ye s , the heart is in abnormal state, notched
R-wave is TRUE in leads (I, V5, and V6), and small R- or QS-wave is TRUE in
leads V1 and V2.
EVENT QRS_Test_LBBB Refines QRS _ Te s t
ANY qrs
WHERE
grd1 : qrs 50 .. 150
grd2
: qrs
120
grd3
: Sinus = Ye s
grd4
:
Heart _ State
=
KO
grd5
:
Notched _ R(I) =
TRUE
Notched _ R(V 5 ) =
TRUE
Notched _ R(V 6 ) =
TRUE
grd6
:
Small _ R _ QS(V 1 ) =
TRUE
Small _ R _ QS(V 2 ) =
TRUE
THEN
act1
:
QRS _ Int
:=
qrs
act2
:
Disease _ step 2
:=
LBBB
END
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