10 Questions
What is the effect of sympathetic inhibition caused by total spinal anesthesia on cardiac output?
The Psf falls to about 4 mm Hg
After sympathetic inhibition by total spinal anesthesia, how does the effectiveness of the heart as a pump change?
Decreases to about 80 percent of normal
What happens to cardiac output after sympathetic inhibition caused by total spinal anesthesia?
Falls to about 60 percent of normal
What is the effect of opening a large arteriovenous fistula on cardiac output?
Increases
What is the primary role of sympathetic stimulation on cardiac output?
Increase cardiac output
How do circulatory changes usually occur after opening a large AV fistula?
Gradually
What is the expected impact on venous return when the Psf falls to about 4 mm Hg?
Reduces venous return
How does maximal sympathetic stimulation affect cardiac output compared to moderate sympathetic stimulation?
Maximal stimulation increases cardiac output more than moderate stimulation
What is the expected change in right atrial pressure during sympathetic inhibition caused by total spinal anesthesia?
Decrease significantly
Which event leads to an immediate decrease in cardiac output?
Opening a large AV fistula
Explore the immediate circulatory effects observed after opening a large fistula in the body. Understand how this action impacts the venous return curve and resistance elements of the peripheral circulation.
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