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EKG 19

QuestionAnswer
ST elevation that returns to baseline with time likely acute MI
ST elevation without associated Q waves likely non-Q wave infarction
small infarct that "heralds" an impending larger infarct non-Q wave infarction
persistant ST elevation in most chest leads, does not resolves with time ventricular aneurysm
flat/slightly concave ST elevation that raises T wave from baseline, returns to baseline with time pericarditis
RBBB + ST elevation in V1-3 brugada syndrome
caused by dysfunctional Na+ channels brugada syndrome
responsible for 1/2 of sudden deaths in young people brugada syndrome
sometimes PVCs produced with ST elevation pericarditis
ST depression subendocardial infarction, angina, digitalis
involves only a small area of myocardium just under the endothelial lining subendocardial infarction
indicates necrosis due to MI significant Q waves
at least one small square wide, or one third of the entire QRS complex amplitude significant Q waves
omitted when looking for significant Qs AVR
ST elevation and/or Qs in V2-4 anterior infarct
ST elevation and/or Qs in V1-3 (and maybe V4) anteroseptal infarct
ST elevation and/or Qs in V4-6 (and maybe V2-3) anterolateral infarct
ST elevation and/or Qs in V1-6 extensive anterior infarct
ST elevation and/or Qs in V5-6 (and maybe I and/or AVL) lateral infarct
ST elevation and/or Qs in I & AVL high lateral infarct
ST elevation and/or Qs in II, III, & AVF inferior infarct
ST elevation and/or Qs in II, III, AVF, V5-6 inferolateral infarct
reversed transillumination or mirror tests posterior infarct
large R wave in V1 posterior infarct, right ventricular hypertrophy
ST depression w/large R waves in V1-2 posterior infarct
indicates areas of ischemia inverted T waves
occur very early in progression of MI hyperacute T waves
>10mm in V-leads, >5mm in limb leads hyperacute T waves
deep Q wave and T wave inversion, with no ST elevation or R 2-3 days
normal R, with peaked ST and hyperacute T wave first day (within first few hrs)
R wave lessens and ST elevation decreases, inverted T wave first few days (or within several hours)
ST elevation only with no significant Qs acute STEMI
significant Q waves with no ST elevation age-indeterminate MI
deep, symmetrically inverted T waves NSTEMI or ischemia
cardiac markers and/or gross examination of the heart differentiates NSTEMI or ischemia
requires order of right sided chest leads acute inferior MI
Created by: drhermy
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