This man's weakness was caused by low potassium. But what made his potassium low?

这名男子的虚弱由体内钾含量低引起。但为何他的钾含量会低呢？

So, with low potassium in the blood, the membrane potential can hyperpolarize, or become more negative.

因此，血中低钾时，膜电位会超极化或者说变得更负。

Low potassium levels leads to issues with muscle contractions, which could be smooth, skeletal, or cardiac muscles.

两种途径的低钾水平都会导致肌肉收缩的问题，可累及平滑肌、骨骼肌或心肌。

JW also has hypokalemia, or low potassium presence in blood because of that beer.

JW也有低钾血症，或者因为饮用大量啤酒导致血液中的钾被稀释。

In addition, these diuretics also allow more water to remain in the lumen, creating a relatively low potassium concentration in the lumen.

此外，这些利尿剂也允许更多的水保留在管腔内，造成管腔内相对低的钾浓度。

The low potassium or hypokalemia is particularly worrisome because it can lead to muscle weakness and even cardiac arrhythmias, the latter of which can lead to death.

其中低血钾是尤其危险的，因为它能导致肌无力甚至心律失常，后者可危及生命。

He eventually found a case report that bore a striking resemblance to his patient: a young man with weak legs, low potassium and a high heart rate.

一名年轻人，双腿无力，钾含量低，心率高。

Common causes of the long QT are inherited genetic long QTs, electrolyte anomalies, such as low potassium, low calcium or low magnesium, ischemia and a long list of medications.

长QT的常见原因是遗传性长QT、电解质异常，如低钾、低钙或低镁、缺血和一系列药物。

Taken together, a relatively high potassium concentration in the principal cell and a relatively low potassium concentration in the lumen, strengthens the potassium gradient and causes a lot of potassium to get secreted and excreted in the urine - leading to hypokalemia.

总之，主细胞中相对高的钾浓度和管腔中相对低的钾浓度，强化了钾的浓度梯度，造成了许多钾被分泌和排泄入尿液，导致低钾血症。