Effect of Magnesium on Ventricular Extrasystoles in Children

Fahrettin Uysal1, Hasan Turkmen1, Abdusselam Genc1

  • 1Department of Pediatric Cardiology, Faculty of Medicine, Bursa Uludag University, Bursa, Türkiye.

Clinical Pediatrics
|January 20, 2024
PubMed

Insights

Oral magnesium supplementation effectively reduced ventricular extrasystoles (VES) in children. This study suggests magnesium therapy can suppress VES, even with normal serum magnesium levels.

Area of Science:

  • Cardiology
  • Pediatric Cardiology
  • Clinical Nutrition

Background:

  • Magnesium (Mg) is vital for cardiovascular health, and its deficiency is linked to cardiac arrhythmias.
  • Ventricular extrasystoles (VES) are common arrhythmias in children, necessitating effective treatment strategies.

Purpose of the Study:

  • To investigate the efficacy of oral magnesium supplementation in reducing the frequency of VES in pediatric patients.
  • To determine if serum magnesium levels influence the effectiveness of oral magnesium therapy for VES.

Main Methods:

  • A cohort of 42 children with VES and no structural heart disease received oral magnesium supplementation.
  • Data were collected through clinical evaluations, electrocardiography, and 24-hour Holter monitoring before and after supplementation.
  • Serum magnesium levels were assessed pre-treatment.

Main Results:

  • Oral magnesium supplementation significantly decreased the mean 24-hour VES burden from 10.26% ± 4.13% to 6.62% ± 3.88%.
  • No significant correlation was observed between pre-treatment serum magnesium levels and the reduction in VES frequency.
  • The treatment was well-tolerated, with no adverse events reported.

Conclusions:

  • Oral magnesium therapy is an effective intervention for suppressing VES in children, irrespective of baseline serum magnesium levels.
  • Further large-scale, randomized controlled trials are warranted to confirm these findings and establish magnesium's role in managing pediatric arrhythmias.

Related Concept Videos

Antiarrhythmic Drugs: Class IV Agents as Calcium Channel Blockers01:20

Antiarrhythmic Drugs: Class IV Agents as Calcium Channel Blockers

Class IV antiarrhythmic drugs, such as verapamil and diltiazem, block calcium channels. They primarily affect the heart, slowing the conduction in calcium-dependent tissues like the SA and AV nodes. These drugs manage reentrant supraventricular tachycardia (SVT) and reduce ventricular rate in atrial flutter/fibrillation.
Verapamil, a calcium channel blocker, inhibits calcium movement across myocardial cell membranes and vascular smooth muscle. This results in the dilation of coronary and...
836
Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow...
961
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
922
Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers01:24

Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers

Adrenergic stimulation generally impacts cardiac rate and rhythm. Specifically, stimulation of the β-adrenoceptors triggers an increase in intracellular calcium ion influx and pacemaker currents, which may cause arrhythmias. Catecholamines like adrenaline also demonstrate β2-adrenoceptor-mediated hypokalemia, impacting cardiac action potential and disrupting the normal cardiac rhythm. Class II antiarrhythmic drugs are β-adrenoceptor antagonists or β-blockers, which...
746
Electrophysiology of Normal Cardiac Rhythm01:19

Electrophysiology of Normal Cardiac Rhythm

The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
4.4K
Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers01:22

Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers

Class I antiarrhythmic drugs are used to treat various types of arrhythmias or irregular heart rhythms. These drugs block the sodium (Na+) channels in the cardiac cells, thereby affecting the movement of electrical impulses across the heart. Class I antiarrhythmic drugs are divided into three subgroups: Class IA, Class IB, and Class IC, each with distinct mechanisms of action and effects on the heart.
Class 1A Antiarrhythmic Drugs: These drugs work by moderately blocking sodium channels,...
1.4K