Welch Allyn Cardioperfect Workstation, PEDMEANS ECG Interpretation Module - Physicians - User Manual - Manual (Page 21)

CardioPerfect Workstation
PEDMEANS ECG Interpretation Module Physicians Manual
DIR 80015051 Rev. C 21 / 55
2.13 Myocardial infarction
The diagnosis of myocardial infarction is largely based on the duration of Q waves and the presence of
QS patterns. The localization of the infarct is determined by the leads in which the abnormalities are
found.
Because infarcts in children are very rare and difficult to diagnose, only “possible” infarct statements
are made. No infarct statements are made in the presence of hypertrophy or LBBB.
Skip tests
if:
hypertrophy
or LBBB
Say:
“possible inferior infarct”
if: Q duration > 35 ms and Q amplitude > 100 µV in II, III, aVF
Say:
“possible anteroseptal infarct”
if: QS pattern in V1
and Q amplitude > 100 µV in V2
Say:
“possible anterior infarct”
if: no Q wave in V1
and Q duration > 35 ms and Q amplitude > 100 µV in V2, V4
or QS pattern and Q amplitude > 100 µV in 3 of all precordial leads
Say:
“possible anterolateral infarct”
if: Q duration > 35 and Q amplitude > 100 µV in V4, V6
Say:
“possible highlateral infarct”
if: Q duration > 35 ms and Q amplitude > 100 µV in I, aVL