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

由于循环系统是闭环，心输出量和静脉回流血量是相等的。

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毫升的大量心包积液可使心音减弱，甚至会降低心输出量，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还会引起心输出量增高，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。

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

通过一些代数的重排列，你可以看到血压等于血流量，或者心输出量，乘以阻力。

Now, in an average adult, there's about five liters of blood total in the body, which just to be clear is different from the cardiac output we just found, which was amount pumped per minute.

一个普通的成年人体内，大约有5升血液，与我们之前算的心输出量不同，那是每分钟心脏泵出的血量。

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.

这些激素提高心率和血容量，从而提高心输出量，同时也收缩不太重要区域的血管，增加整体阻力，从而增加压力。

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，肾血流量约占心输出量（左心室输出量）的1/4。

One major short-term fix to wonky blood pressure comes from your brain, which targets both cardiac output and resistance, by altering the distribution of the blood flow around the body, or by changing the diameter of certain blood vessels.

对不稳定血压的一个主要短期解决方案来自你的大脑，它通过改变身体周围血流的分布或某些血管的直径来控制心输出量和阻力。

All right, so if we simplify this guy a little bit, then the amount of blood that's pumped out by either of the ventricles over a period of time is called the cardiac output.

我们稍微简化一下：在一段时间内，任一心室泵出的血液量，称为心输出量。

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心输出量来工作。

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

论上，这意味着任何阻力或心输出量的变化也会改变血压。

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.

这也被称为心输出量，它是由一次跳动中泵出的血量决定的，每分钟跳动的次数。

First, there are, yes, physical changes: the slow decline of reaction time, muscle tone, and strength, cardiac output, sex hormone production, and sharpness of senses like hearing and sight.

首先， 是的， 身体变化：反应时间、 肌肉张力和力量、 心输出量、 性激素产以及听觉和视觉等感官敏锐度的缓慢下降。

The goal of rate control in AFib is to allow more diastolic filling time, and that improves cardiac output and reduces patient symptoms.

房颤（AFib）中控制心率的目标在于增加舒张充盈时间，这能提升心脏输出量并减轻患者症状。

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

当心率和每博输出量增加时，我们发现心输出量增加。

So the mechanism, it is alpha-1 agonist causing vasopressor constriction, beta-1 agonist causing increased cardiac output.

其作用机制是α-1受体激动引起血管收缩，β-1受体激动心输出量增加。

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、心输出量和全身灌注。

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

如果身体需要更多的血液，则心脏会增加心输出量。

Cardiac output equals the number of heartbeats per minute times the volume of blood pumped out of the ventricles with each heartbeat.

心输出量等于每分钟心跳次数乘以每次心跳从心室泵出的血液量。

The higher the cardiac output, the higher the mean arterial pressure, because there is more blood being pumped out of the heart and flowing into the arterial system.

心输出量越高，平均动脉压越高，因为有更多的血液从心脏泵出并流入动脉系统。