Some places you can check a pulse on a newborn. 1  Apical: Gently place two fingers over the center of the sternum (breast bone) and then move them about 1 inch to the left of the breast bone, at or above the nipple line. Without compressing, you should be able to feel the baby's heart beat beneath.
The body maintains the right level of potassium by matching the amount of potassium consumed with the amount lost. Potassium is consumed in food and drinks that contain electrolytes (including potassium) and lost primarily in urine. Some potassium is also lost through the digestive tract and in sweat.
Most of the potassium in your body is in the fluid inside of cells. As the balance of fluid shifts when you have too much potassium, you could wind up with more pressure inside of cells and not enough on the outside of cells. Picture filling up a balloon to where it exceeds its capacity and is about to burst. The same sort of thing happens to cells.