Which electrolyte is most closely associated with cardiac function?
Which electrolyte is most closely associated with cardiac function?
(A) Calcium
(B) Magnesium
(C) Sodium
(D) Potassium
Potassium is regarded as the most important electrolyte in heart function because it is primarily involved in the regulation of the electrical rhythm of the heart. Abnormalities of potassium (hyperkalemia or hypokalemia) are the most frequent causes of potentially life-threatening arrhythmias and sudden cardiac death.