Upper Marlboro, officially the Town of Upper Marlboro, is the seat of Prince George's County, Maryland in the United States.
According to the American Heart Association, potassium imbalances are the most common electrolyte-associated cardiac arrhythmias. Potassium plays a role in both nerve conduction and the heartâs ability to send an electrical impulse. Low potassium levels can cause relatively stable arrhythmias, while high potassium levels can quickly lead to lethal arrhythmias. Sodium, magnesium and calcium imbalances also place the heart at risk for arrhythmias.
The serum electrolytes include: 1  Sodium (Na). 2  A positively charged electrolyte that helps to balance fluid levels in the body and facilitates neuromuscular functioning. 3  Potassium (K). 4  A main component of cellular fluid, this positive electrolyte helps to regulate neuromuscular function and osmotic pressure. 5  Calcium (Ca).he serum electrolytes include: 1  Sodium (Na). 2  A positively charged electrolyte that helps to balance fluid levels in the body and facilitates neuromuscular functioning. 3  Potassium (K). 4  A main component of cellular fluid, this positive electrolyte helps to regulate neuromuscular function and osmotic pressure. 5  Calcium (Ca).