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5 Cards in this Set
- Front
- Back
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Ischemic Heart Disease (Angina)
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The imbalance between the myocardial need for Oxygen and the adequacy of supply.
Disorder of myocardial blood flow due to stable and unstable coronary atherosclerosis plaques. |
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Stable Plaque
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Stable Plaque: Fixed obstruction
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Unstable Plaque
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Unstable Plaque: Fissures or ruptures, platelet aggregation, thrombus formation.
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Mechanisms of Ischemic Heart Disease
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Hypoperfusion of coronary arteries (BP is too low) due to the lumen reduced in size by 75%
Decreased oxygen carrying capacity of the blood (anemia, carbon monoxide poisoning, pulmonary disease) Increased myocardial demand. Page 5-7 look at the differences between stable and unstable angina Clinical manifestations on page 5-6 |
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Myocardial Infarction (MI)
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MI is an acute coronary syndrome, results from reduced blood flow through one of the coronary arteries. This may then cause myocardial ischemia, injury, and necrosis
In MI, one of the heart’s arteries fails to deliver enough blood to the part of the heart muscle it serves ----It happens by the result of **occlusion** by one or more of the coronary arteries. Occlusion can stem from atherosclerosis, thrombosis, platelet aggregation, or coronary stenosis or spasm. |
