Lester is one of the British surname names that were popular in the US in the early decades of the twentieth century: it was in the Top 100 through 1931, reaching a high of Number 52 in 1906.ester is one of the British surname names that were popular in the US in the early decades of the twentieth century: it was in the Top 100 through 1931, reaching a high of Number 52 in 1906.
Normal blood levels of potassium are critical for maintaining normal heart electrical rhythm. Both low blood potassium levels (hypokalemia) and high blood potassium levels (hyperkalemia) can lead to abnormal heart rhythms. The most important clinical effect of hyperkalemia is related to electrical rhythm of the heart.
Small changes in the level of potassium that is present outside the cells can have severe effects on the heart, nerves, and muscles. Potassium is important to maintain several bodily functions: 1  Muscles need potassium to contract. 2  The heart muscle needs potassium to beat properly and regulate blood pressure.