Anterior infarction – Welch Allyn Means ECG Physicians Manual for CP Series Electrocardiographs - User Manual User Manual
Page 21
MEANS Physicians Manual
Welch Allyn
21
Anterior infarction
Say:
“anterior infarct”
if:
Q duration
35 ms and Q/R ratio
1/3 in V3 or V4
or
Q duration
40 ms and Q amplitude > 100 µV in V3 or V4
or
QS pattern in V3 or V4
or
R amplitude < 100 µV in V3 and V4
or
R amplitude < 100 µV in V4 and V5
or
R amplitude < 150 µV in V2 and V3
and
R amplitude < 150 µV or Q wave in V4
or
R amplitude < 150 µV in V3 and V4
and
R amplitude < 150 µV or Q wave in V5
or
R amplitude in V3 < R amplitude in V2
and
R amplitude in V3 < 150 µV
and
R amplitude in V3 > R amplitude in V4 or Q wave in V4
or
R amplitude in V4 < R amplitude in V3
and
R amplitude in V4 < 150 µV
and
R amplitude in V4 > R amplitude in V5 or Q wave in V5
Say:
“probable anterior infarct”
if:
25
Q duration < 35 ms and Q/R ratio
1/3 in V3 or V4
or
35
Q duration < 40 ms and 1/4
Q/R ratio < 1/3 in V4 or V5
or
R amplitude in V3 < 150 µV
and
R amplitude in V3 < R amplitude in V2
50 µV
and
R duration in V3
R duration in V2
or
R amplitude in V4 < 150 µV
and
R amplitude in V4 < R amplitude in V3
50 µV
and
R duration in V4
R duration in V3
Say:
“possible anterior infarct”
if:
25
Q duration < 35 ms and 1/4
Q/R ratio < 1/3 in V3 or V4