Septal infarction – Welch Allyn Means ECG Physicians Manual for CP Series Electrocardiographs - User Manual User Manual
Page 20
MEANS Physicians Manual
Welch Allyn
20
Septal infarction
Say:
“septal infarct”
if:
Q duration
35 ms and Q/R ratio
1/3 in V1 or V2
or
Q duration
40 ms and Q amplitude > 100 µV in V1 or V2
or
QS pattern in V2
and
R amplitude in V1
70 µV
or
QS pattern in V3
or
Q duration in V3
25 ms
or
Q wave and R amplitude < 250 µV and R duration < 26 ms in V3
or
R amplitude < 200 µV and R duration < 16 ms in V3
Say:
“probable septal infarct”
if:
25
Q duration < 35 ms and Q/R ratio
1/3 in V2 or V3
or
35
Q duration < 40 ms and 1/4
Q/R ratio < 1/3 in V2 or V3
or
Q duration
30 ms and R amplitude
200 µV in V2
or
R amplitude in V2 < 150 µV
and
R amplitude in V2 < R amplitude in V1
50 µV
and
R duration in V2
R duration in V1
or
Q duration in V3
25 ms
Say:
“possible septal infarct”
if:
25
Q duration < 35 ms and 1/4
Q/R ratio < 1/3 in V1 or V2
or
QS pattern and R amplitude < 70 µV in V1
and
QS pattern in V2
and
test LVH did not pass
or
QS pattern or R amplitude < 70 µV in V1
and
Q amplitude < S amplitude and R amplitude < S amplitude in V2
and
test LVH did not pass