MI Flashcards
ecg change immediately before the actual MI starts
t - wave inversion
egg change within hours after MI started and its age
acute - marked st elevation with upright t-wave
egg change hours later after MI started and age
acute - significant q and st elevation and upright t-wave
ecg change hours to a day or 2 days later and age
acute - significant q waves, and less st elevation with marked t inversion
egg change days to weeks later (can last up to a year) and age
age indeterminate with significant q and t wave inversion
egg changes weeks months or years after MI and age
significant q only
what egg change is seen when cardiac tissue is ischemic
newly inverted t waves
what ecg change is seen when acute mi begins and starts myocardial injury
marked st elevation and upright t-waves
what ecg change is seen when some of the injured myocardial tissue has died, and other tissue remains injured
significant q and st elevation with upright t waves
what ecg change is seen when infarction is almost complete, and some injury and ischemia persist at the infarct edges
significant q + less st elevation + marked t inversion
what ecg change is seen when infarction is complete
significant q waves and t wave inversion
what ecg change is seen with an “old” mi and what does it signify
significant q wave persists, signifying permanent tissue death
anterior infarct location is seen where
indicative changes in v1 to v4
reciprocal changes in II, III, avF
inferior infarct location is seen where
indicative changes in II, III, avF
reciprocal changes in I, avL, and V leads
lateral infarct is seen where
indicative changes in I, avL, v5-v6
may see reciprocal changes in II, III, aVF
posterior infarct is seen where
no indicative changes since no leads look directly at posterior wall
how is posterior infarct diagnosed
reciprocal changes in v1 and v2 (large R wave, upright T wave, and possibly st depression) seen as a mirror image of an anterior MI
extensive anterior aka extensive anterior-lateral
indicative changes in I, avL, V1-V6
reciprocal changes in II, III, aVF
anteroseptal
indicative changes in v1 and v2
usually no reciprocal changes
what coronary artery feeds the anterior segment
Left anterior descending (LAD)
what coronary artery feeds the inferior segment
right coronary artery (RCA)
what coronary artery feeds the lateral segment
circumflex
what coronary artery feeds the posterior segment
rca or circumflex
what coronary artery feeds the extensive anterior
lad or left main artery
