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15 Cards in this Set
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- Back
- 3rd side (hint)
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BP = F x R
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-Flow (cardiac output (CO))
-Resistance (vessel diameter) |
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CO = ? x ?
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CO = HR x SV
-Heart Rate beats/min -Stroke Volume- blood ejected from L ventricle; ml/beat |
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Mean Arterial Pressure
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MAP = CO x SVR
-systemic vascular resistance |
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How is BP maintained?
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by adjusting CO for SVR
-if SVR is high, the body decreases CO (cardiac output) |
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BP patho of SNS Neural (short term)
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-increase HR and contractility
-increased activity = vessel constriction -decreased activity = vessel relaxation |
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BP patho of PNS Neural
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-slows HR via vagus nerve
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baroreceptors
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pressure sensitive receptors in vessel walls
-they send messages to either SNS or PNS |
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What is PVD
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-Peripheral VAscular Disease
-Narrowing of blood vessels outside of heart and brain -Arterial or venous or both -Often thought as arterial problems |
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Thromboangiitis Obliterans
Buerger's Disease |
-Peripheral artery inflammatory disease
-young men who smoke |
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Patho of Buerger's Disease
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-med and sm artery inflammation
-hands and feet -emboli -vasospasm -ischemia...pain...necrosis |
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Raynaud's Disease
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Patho:
-Idiopathic -Secondary to systemic diseases -Vasospasms in small arteries and arterioles (fingers and toes) |
S/S
-Pallor -Numbness -Sensation of cold digits -Bilateral -Canosis Rubor -Throbbing |
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Varicose veins
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-Dilated, tortuous veins of lower extremities
-Superficial saphenous vein only covered by fat and skin |
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DVT risk factors
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Deep Vein Thrombisis
-prolonged immovility -dehydration smoking oral contraceptives varicose veins deficiencies of naturally occurring anticoagulants |
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Myocardial Ischemia Patho
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-Insufficient Oxygen
-cells switch to anaerobic metabolism -Lactic acid formed -Cellular function impaired -Inverted t wave |
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MI patho
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-Oxygen supply inadequate
-O2 reserves last for 8sec -cells switch to anaerobic metabolism -Lactic acid accumulates K, Ca, and Mg leaks out -Cell contraction stops |
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