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20 Cards in this Set
- Front
- Back
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Cause of Myocardial Injury?
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Complete occlusion of coronary artery
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Cause of myocardial ischemia?
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Coronary artery still has some flow, but not enough to supply O2 demand
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MI occurs when?
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after a STEMI or myocardial injury
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EKG sign of Myocardial injury?
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ST elevation 2cm high in 2 consecutive leads; peaked T wave
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Ekg sign of myocardial ischemia?
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ST depression, T wave inversion
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Ekg sign of myocardial infarction?
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Q wave deeper and wider than 1 mm
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What are the two kinds of myocardial ischemia we talked about?
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unstable angina, NSTEMI
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Clinical def of acute myocardial infarction?
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Elevated troponin I or T with one of the abnormal EKGs
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What is the worst kind of ST elevation?
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tombstone (convex)
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Is an ST elevation necessarily pathognemonic for myocardial injury?
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no, can be pericarditis, pericarditis, aneurysm
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What else can a peaked T wave be indicative of?
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hyperkalemia
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What does a ST wave look like a the time of, a few hours after, 4-6 weeks after and 2 months after STEMI?
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Initially - T wave moves towards QRS, elevated; Hours After - moves away, inverts, Q wave develops; 4-6 weeks - Just inverted with Q wave; 2 months - T wave normalizes, just Q is left;
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Why might you never see Q waves on a STEMI?
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because you intervened so quickly they couldn’t develop
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Which leads associated with anterior heart?
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V1-V4
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Which leads associated with lateral heart?
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V5,V6, I, AvL
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Which leads associated with inferior heart?
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II,III, aVF
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Which leads associated with RCA?
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II,III, aVF
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Which leads associated with LAD?
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V1-V4
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Which leads associated with circumflex?
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V5,V6, I, AvL
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Which types of mycocardial damage are usually transmural and which subendocardial?
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transmural - Injury, Infarct; Subendo - ischemia;
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