Answer :
Main Answer:
Excessive ventilation can lead to Decrease cardiac output. The correct option is B.
Explanation:
Excessive ventilation, or hyperventilation, can result in decreased cardiac output. This occurs because rapid and deep breaths reduce the venous return of blood to the heart, leading to less blood being pumped out with each heartbeat. As a consequence, cardiac output, which is the amount of blood the heart pumps per minute, decreases. While ventilation is essential for oxygenation, an imbalance can adversely affect the cardiovascular system, compromising overall perfusion. The correct option is B.
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Final answer:
Excessive ventilation leads to an increase in respiratory rate and a decrease in the volume of air per breath. This causes a decrease in intrathoracic pressure, inhibiting venous return to the heart and leading to a decrease in cardiac output.
Explanation:
In the context of Science of Resuscitation, excessive ventilation can lead to certain problems. The major effect is the decrease in cardiac output. When ventilation is excessively high, the respiratory rate increases and the volume of air per breath decreases. This can decrease intrathoracic pressure leading to decreased venous return to the heart and consequently, decreased cardiac output. This happens because the increase in intrathoracic pressure can impede venous return, which directly affects the cardiac output.
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