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13 Cards in this Set
- Front
- Back
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Complications of Transmural MI
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Transmural Infarction size
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If the area of the transmural infarction is small, the necrotic wall may be dyskinetic, a term meaning “difficulty in moving.”
If the damage to the myocardial tissue is more extensive, the myocardial muscle may become akinetic, meaning “without motion.” |
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Effect of myocardial ischemia, injury and infarction on ECG
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Most common complication after MI
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Arrhythmias in 80%.
Caused by any condition that affects myocardial sensitivity to nerve impulses (ischemia, electrolyte imbalance, and SNS stimulation) |
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MI complication - papillary rupture and treatment
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Postero-medial papillary muscle (75%), Antero-lateral papillary muscle (25%), leads to mitral regurgitation
4-7 days after MI Reduce magnitude regurgitation, increase systemic perfusoin and ventricular performance. Use nitroprusside, nitroglycerin, dobutamine, IABP |
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MI --> Pericarditis (timing)
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Inflammation of pericardium may result in cardiac compression, decreased ventricular filling and emptying --> cardiac failure
2 -3 days after MI |
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Dressler Syndrome
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As late as 1-8 wks after MI. Treat with aspirin 650 mg every 4-6 hrs. Result of pericardial antigens being exposed and Abs being made against them.
Presentation: Malaise, fever, pericardial discomfort, leukocytosis, elevated ESR and pericardial effusion |
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Complications of MI - ventricular aneurysms
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Comp of transmular MI leads to hemodynamic compromise (HF, thrombo-embolism and arrhythmias)
Results when infarcted myocardium becomes thin and bulges out |
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Complications of MI - CHF
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Seen w/in 24 hrs when the pumping power of the heart is diminished
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Complication of MI - PE
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If patient has CHF or stasis
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Complications of MI - Cardiogenic Shock
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When inadequate oxygen and nutrients are supplied to tissue b/c of severe LV failure. Occurs when loss of function of at least 40%
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Sudden Cardiac Death
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Natural unexpected death due to cardiac causes. 300,000 deaths per year in US. Leading cause of death of 20-30 yr old men.
Cause: IHD, Cardiomyopathy, Valvular heart diseases, Tet of Fallot --> Lethal arrhythmias |
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Chronic Ischemic Heart Disease
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Severe coronary AS with impaired myocardial contractility due to healed MI or ischemic cardiomyopathy and diffuse myocardial fibrosis
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