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5 Cards in this Set
- Front
- Back
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What is the basic chain of events in compensated heart failure?
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Sympathetic output increases, resulting in vasoconstriction of the afferent arterioles. This decreases the glomerular hydrostatic pressure and thus the glomerular filtration rate resulting in an increase in sodium and water retention in the body. Increased release of angiotensin 11 also occurs.
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What is capillary net filtration pressure?
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Net filtration pressure = capillary hydrostatic pressure- plasma colloid osmotic pressure+ interstitial colloid osmotic pressure- interstitial hydrostatic pressure.
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What is the formula for resistance to venous return?
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The formula is mean systemic filling pressure-right atrial pressure divided by cardiac output. In one example, the mean systemic filling pressure is 9mm of Hg, and the right atrial pressure is -0.5mm of Hg. The CO is 6.8L/min. using these values, the resistance to venous return is 1.40mmHg/L/min.
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List several events that occur in progressive shock?
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1.Increases capillary permeability
2. vasomotor center failure 3. peripheral circulatory failure 4. decreased cellular mitochondrial activity 5. acidosis througout the body. 6. Urine output decreases. |
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What does Atrial natriuretic peptide do?
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It inhibits renin release(and angiotensin 11 formation). It also inhib its renal tubular sodium reabsorption, which leads to an increase in sodium excretion.
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