Studies on digitalis. XIV. Is there any correlation between hypomagnesemia and digitalis intoxication?

Area of Science:

• Cardiology
• Clinical Biochemistry

Background:

• Digitalis intoxication is a significant clinical concern.
• Electrolyte imbalances can influence digitalis toxicity.
• Serum magnesium levels are routinely measured in cardiac patients.

Purpose of the Study:

• To investigate the prevalence of hypomagnesemia in patients with digitalis intoxication.
• To identify patient characteristics and symptoms associated with hypomagnesemia in this cohort.
• To explore the relationship between serum magnesium, potassium, and digitalis levels.

Main Methods:

• Prospective study design.
• Measurement of serum magnesium and potassium levels.
• Assessment of digitalis intoxication symptoms and serum digitoxin concentrations.

Main Results:

• Hypomagnesemia (low serum magnesium) was observed in 90 patients.
• Hypomagnesemia was more prevalent in women, individuals with low body weight, and those with advanced heart failure.
• Symptoms like nausea, anorexia, fatigue, visual disturbances, and atrial tachycardia with block were more frequent in hypomagnesemic patients.
• Hypomagnesemic patients had lower serum potassium levels.
• No significant difference in digitalis intoxication prevalence or serum digitoxin levels was found between groups.

Conclusions:

• Hypomagnesemia is a frequent finding in digitalis intoxication.
• Electrolyte disturbances, specifically hypomagnesemia and hypokalemia, are associated with digitalis toxicity.
• Serum magnesium levels do not correlate with the severity of digitalis intoxication or serum digitoxin concentrations.