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10 Cards in this Set
- Front
- Back
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Explain the cardiac physiologic mechanism and result from a sudden demand for increase in cardiac output.
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Heart dilates to increase CO. The stretch of the myocytes causes increase contractility
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Define left sided forward failure
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Left ventricle decreased volume or contractility decreases CO, causing Renin/AgII release causing vasoconstriction.
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Right sided backward failure
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Decreased right ventricle output would back up venous return.
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Define left to right shunt in congenital heart defect in a new born lamb.
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PDA
VSD PFO |
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Explain the development of cyanosis tardive in the lamb at 12 weeks
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VSD - left to right
RV hyperplasia, switch to right to left Pulmonary hypertension |
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List two causes of non-inflammatory fluid accumjulation in the pericardial sack
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hydopericardium - low protein fluid loss into pc sac
hemopericardium - coronary artery rupture, V or A rupture |
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List the species and conditions in which endocardioisis is most prevalent and what valve is most commonly affected
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Canine - CHF
left AV valve |
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Describe the functional disorder difference between eccentric and concentric cardiomegaly
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eccentric - dilatative free wall is thin, septum normal. increased volume
concentric - hypertrophy causes lumen diameter decrease |
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Describe the gross appearance difference between eccentric and concentric cardiomegaly
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eccentric - free wall thin, septum normal
concentric - lumen decreased, outline normal. |
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List three pathologic mechanisms for vascular response to injury
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weakening of vessel walls with dilatation or rupture
Narrowing of lumen and development of ischemia Damage of endothelium followed by intravascular thrombosis |
