If it involves the renal artery and limits blood flowing to the kidneys, it triggers more renin.

如果累及肾动脉并且限制了肾脏的血流，它就会引发更多肾素的释放。

The diagnosis of hyperaldosteronism is mainly done by measuring levels of renin and aldosterone.

醛固酮增多症的诊断主要通过测定肾素与醛固酮的水平来完成。

So in this case aldosterone levels are high and renin levels are low in.

因此，在这种情况下，醛固酮水平较高，肾素水平较低。

But, as I mentioned earlier, this renin angiotensin aldosterone system is stimulated by low salt intake.

但是，正如我之前提到的，低盐饮食会导致 RAA 系统活跃。

Secondary causes of hyperaldosteronism are usually due to excess aldosterone production in response to high levels of renin.

醛固酮增多症的继发性原因通常是由于高水平肾素导致醛固酮生成过多。

Another example is a tumor that produces excess aldosterone, which just like renin, leads to fluid retention.

另一个例子是肿瘤的生长也会产生过多的醛固酮，一种类似于肾素的物质，会导致液体的积存。

When not enough blood flows to the kidneys, the kidney secretes the hormone renin, which ultimately helps the kidneys retain more water.

当肾脏中的血流不充足时，肾脏就会分泌肾素，以帮助肾脏留存住更多的水。

In chronic kidney disease, the falling glomerular filtration rate leads to more and more renin secretion which leads to hypertension.

慢性肾病中，GFR降低，导致更多肾素分泌，进而引发高血压。

Another study shows that when salt intake drops below 1.5 teaspoons per day, a significant increase in renin and aldosterone occurs.

另一项研究显示，当盐摄入量降至每天 1.5 茶匙以下，人体中的醛固酮及肾素水平将大幅上升。

For example, normally when the kidneys start sensing a lower than normal amount of fluid getting filtered, they respond by releasing the hormone renin to increase the blood pressure.

例如，通常肾在感知到滤过量减少时会释放肾素作为应答，升高血压。