From the Guidelines
Yes, hypermagnesemia can cause palpitations, as extremely high serum magnesium levels may produce cardiac arrhythmias. Hypermagnesemia is defined as a serum magnesium concentration >2.2 mEq/L, and it can occur in individuals with kidney dysfunction or those taking excessive amounts of magnesium-containing medications or supplements 1.
Symptoms of Hypermagnesemia
- Muscular weakness
- Paralysis
- Ataxia
- Drowsiness
- Confusion
- Vasodilation and hypotension
- Bradycardia
- Cardiac arrhythmias
- Hypoventilation
- Cardiorespiratory arrest
If you're experiencing palpitations and suspect high magnesium levels, you should discontinue any magnesium supplements and seek medical attention for proper evaluation. Treatment typically involves stopping magnesium intake, and in severe cases, may require calcium gluconate administration or dialysis, as suggested by the American Heart Association guidelines 1. Magnesium plays a crucial role in cardiac function by regulating electrical impulses in the heart, which explains why both high and low levels can disrupt normal heart rhythm. It is essential to seek medical attention immediately if you are experiencing symptoms of hypermagnesemia, as prompt treatment can help prevent serious complications, including cardiac arrest.
From the Research
Hypermagnesemia and Palpitations
- Hypermagnesemia is a condition characterized by elevated magnesium concentrations in the blood, which can lead to various complications, including cardiovascular issues 2.
- Magnesium plays a crucial role in cardiac excitability, and abnormalities in magnesium levels can affect heart function 2, 3.
- While hypomagnesemia is often associated with cardiac arrhythmias, hypermagnesemia can also have adverse effects on the cardiovascular system, including respiratory and cardiovascular negative outcomes 2.
- However, there is limited direct evidence linking hypermagnesemia to palpitations specifically.
- Studies have shown that magnesium is important in cardiac arrhythmias, and intravenous magnesium can be used to treat certain types of arrhythmias, such as Torsade de pointes tachycardias and digitalis toxicity induced tachyarrhythmias 3.
- Additionally, oral magnesium has been used to reduce the incidence of extrasystoles and symptoms in patients with symptomatic extrasystoles 3.
- It is essential to note that hypermagnesemia can occur in patients with impaired renal function or those receiving magnesium-containing medications or supplements, and prompt identification and management are crucial to prevent complications 2, 4, 5, 6.