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13 Cards in this Set
- Front
- Back
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CHF can be due to either diastolic or systolic failure. What are these processes?
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Diastolic failure: decreased ejection fraction and decreased CO (because not getting enough blood back to the heart)
Systolic failure: decreased inotrophy and increased tension of cardiac muscle during contraction (not pumping enough blood out) |
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How does body position help determine blood distribution?
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upright posture increases extrathroacic volume and decreases ventricular work
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How does intrathoracic pressure help determine blood distribution?
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inspiration causes pressure to become more negative, which increases thoracic blood volume
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How does intrapericardial pressure help determine blood distribution?
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increased pressure causes decrease filling and decrease stroke volume
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How does venous tone help determine blood distribution?
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venous contraction occurs during exercise and deep inspiration
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How does skeletal muscle contraction help determine blood distribution?
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decrease extrathoracic volume, increase intrathooracic volume, increased ventricular EDV, increase ventricular work
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What intrathoracic and intraabdominal pressure changes are associated with INSPIRATION?
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decrease intrathoracic pressure and increase intraabdominal pressure (fluid is squeezed from abdomen into thorax with help of valves in veins and lymphatics)
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What intrathoracic and intraabdomina pressure changes are associated with EXPIRATION?
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increase intrathoracic pressure, decrease intraabdominal pressure (drop in abdominal pressure pulls blood and lymph from periphery to get ready for next cycle)
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How does thoracic cage dysfunction affect circulation?
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causes decreased left sided preload
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How does skeletal muscle dysfunction affect circulation?
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venous return to right atrium is decreased if the skeletal muscles aren't working those veins like a hooker on Tiger Woods
VERY FUNNY |
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Dysfunctional musculoskeletal can compromise venous and lymph flow :( How can you enhance the flow?
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decrease myofascial tension that blocks peripheral vessels
treat any dysfunction decrease facilitation (decreasing sympathetic tone and its effects on peripheral vasculature and heart) |
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What sympathetic somatovisceral mechanisms are present in CHF?
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spinal facilitation = increased sympathetic tone = increased vascular tone = decreased tissue perfusion
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What PARAsympathetic somatovisceral mechanisms are present in CHF?
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spinal facilitation = increased parasympathetic tone = decreased HR
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