As noted in the previous sections, magnesium deficiency is associated with an imbalance in many other minerals inside the cell. Mineral imbalances are quite dangerous, and may even result in alterations in the heartbeat. In this case, magnesium deficiency causes a change in the level of potassium both inside and outside of the cells in the heart muscle. Heart muscle works with a membrane potential that requires a healthy level of potassium on both sides of the cell lining, and this alteration may lead to a chaotic contraction of the heart. This is one of the most serious problems that may result from magnesium deficiency because in severe cases it is associated with blood clot formation, heart attack, fainting, and other cardiovascular problems.
However, in most cases, arrhythmia caused by magnesium deficiency is mild and not every patient has noticeable symptoms. When they do, it is often felt as palpitations, as if the heart was about to leave the chest. Do not take it lightly and if you have any doubt or concern, ask your doctor about your symptoms.