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Cardiology: Venous Return and Starling Law
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Cardiology: Venous Return and Starling Law

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Questions and Answers

What factors influence venous return, in addition to systemic filling pressure?

  • Muscle fiber length and heart rate
  • Resistance to flow and right atrial pressure (correct)
  • Blood volume and blood viscosity
  • Cardiac output and stroke volume

    • Under normal, nonstressed conditions, what determines stroke volume (SV)?

  • Muscle fiber length
  • Blood pressure
  • Heart rate
  • Venous return (correct)

    • What happens to the force of ventricular contraction in the failing heart?

  • It becomes independent of ventricular filling
  • It increases proportionally to ventricular filling
  • It remains constant regardless of ventricular filling
  • It decreases proportionally to ventricular filling (correct)

    • What does a breakdown of the Starling law lead to in the failing heart?

    <p>Decreased blood flow through the systemic and pulmonary circulations</p> Signup and view all the answers

    What is the primary determinant of stroke volume under normal conditions?

    <p>Factors that regulate venous return</p> Signup and view all the answers

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