Since the circulatory system is a closed loop, cardiac output and venous return are equal.

由于循环系统是闭环，和静脉回流血是相等。

And again, just like with neural controls, these hormonal controls work by changing vessel resistance and cardiac output.

同样，就像神经控制一样，这些荷尔蒙控制通过改变血管阻力和来工作。

In theory, this means that any change in resistance or cardiac output would also change blood pressure.

理论上，这意味着任何阻力或变化也会改变血压。

So, with a little algebraic rearranging, you can see that blood pressure equals blood flow, or cardiac output, times resistance.

通过一些代数新排列，你可以看到血压等于血流，或者，乘以阻力。

Because of this the kidneys get about a quarter of the cardiac output which is blood getting pumped out of the left ventricle.

因此，肾血流约占（左室）1/4。

We previously learned that cardiac output is the amount of blood pumped per minute by each ventricle.

我们先前了解到，是每个室每分钟泵血液。

Therefore, we see that the sympathetic nervous system increases heart rate, which increases cardiac output.

因此，我们看到交感神经系统会增加率，从而增加。

There are three important factors that affect mean arterial pressure: cardiac output, total peripheral resistance, and blood volume.

，总外周阻力和血容。

We also see that the parasympathetic nervous system decreases heart rate, which decreases cardiac output.

我们还看到副交感神经系统降低了率，从而降低了。

This is also called cardiac output, and it's determined by the blood volume pumped during one beat, and the number of beats per minute.

这也被称为，它是由一次跳动中泵血决定，每分钟跳动次数。

Therefore, if something increases or decreases the heart rate or stroke volume, it will increase or decrease the cardiac output, respectively.

因此，如果某因素增加或降低了律或每博，则将分别增加或降低。

Mean arterial pressure is influenced by three main factors, including cardiac output, total peripheral resistance, and blood volume.

平均动脉压受三个主要因素影响，包括，总外周阻力和血容。

In the opposite way, the parasympathetic nervous system can decrease the heart rate, which decreases the cardiac output.

副交感神经系统以相反方式，可以降低率，从而降低。

Cardiac output (CO) is the term used to show the amount of blood pumped per minute by each ventricle.

（CO）是用于显示每个室每分钟泵血术语。

When heart rate and stroke volume increase, we see an increase in cardiac output.

当率和每博增加时，我们发现增加。

In addition, Healthcare professionals should titrate fluid administration and vasoactive or inotropic agents as needed to optimize blood pressure, cardiac output, and systemic perfusion.

此外，医疗保健专业人员应根据需要滴定液体给药和血管活性剂或正性肌力药物，以优化血压、和全身灌注。

If your body needs more blood, then your heart will increase the cardiac output.

如果身体需要更多血液，则脏会增加。

Larger pericardial effusions, those over 100ml of fluid, can cause diminished heart sounds, and can even diminish cardiac output leading to shortness of breath, low blood pressure, and lightheadedness.

超过100毫升大包积液可使音减弱，甚至会降低，导致呼吸困难、低血压与头晕。

T3 increases cardiac output, stimulates bone reabsorption thinning out the bones and then activates the sympathetic nervous system, the part of the nervous system responsible for our fight-or-flight response.

T3还会引起增高，刺激骨骼再吸收，引起骨骼变薄并激活交感神经系统；交感神经系统主管着“战或逃”反应。

These hormones raise both the heart rate and the blood volume, and therefore cardiac output, while also constricting vessels in less essential regions, increasing the overall resistance, and therefore pressure.

这些激素提高率和血容，从而提高，同时也收缩不太要区域血管，增加整体阻力，从而增加压力。