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Measuring Cardiac Autonomic Nervous System (ANS) Activity in Toddlers - Resting and Developmental Challenges
Published on: February 25, 2016
Infants and children with tachycardia: natural history and drug administration
Peter P Karpawich1, Michael D Pettersen, Pooja Gupta
1Section of Pediatric Cardiology, Carmen and Ann Adams Department of Pediatrics, Children's Hospital of Medicine, Wayne State University School of Medicine, Detroit, Michigan 48230, USA. pkarpawi@dmc.org
Insights
Pediatric tachyarrhythmias, often caused by developmental or genetic factors, are frequently managed with medication. This review focuses on identifying and treating these abnormal heart rhythms in infants and children.
Area of Science:
- Pediatric Cardiology
- Electrophysiology
- Genetics
Background:
- Tachyarrhythmias in the young stem from congenital heart defects, genetic ion channel abnormalities, and conduction tissue alterations, differing from adult ischemic causes.
- Abnormal heart rhythms in children can resolve spontaneously with growth, unlike adult-onset conditions.
- Supraventricular and ventricular tachyarrhythmias occur in the young, with atrial abnormalities being more prevalent.
Purpose of the Study:
- To review common and uncommon fetal and infant tachyarrhythmias.
- To emphasize electrocardiographic identification and associated congenital heart defects.
- To detail recommended pharmacologic management strategies based on drug mechanisms.
Main Methods:
- Review of existing literature on pediatric tachyarrhythmias.
- Analysis of electrocardiographic findings for rhythm identification.
- Compilation of pharmacologic treatments and dosages for infants and children.
Main Results:
- Pharmacologic therapy is the primary intervention for infant and young child tachyarrhythmias.
- Ablation is reserved for drug-refractory cases due to potential risks.
- The review categorizes drug therapies by mechanism of action for specific tachyarrhythmias.
Conclusions:
- Effective management of pediatric tachyarrhythmias relies on accurate diagnosis and tailored pharmacologic approaches.
- Understanding the underlying causes, including genetic and developmental factors, is crucial for treatment.
- This review provides a guide to pharmacologic agents and dosages for treating tachyarrhythmias in the young.
Abstract:
Tachyarrhythmias can occur at any age from the developing fetus through adulthood. However, in deference to adult-onset ischemic cardiac issues, abnormal heart rhythms occurring in the young are often due to developmental alterations of the cardiac conduction tissue, genetically-inherited changes of myocardial cellular ion membrane properties and both pre- and post-surgical repair of associated structural congenital heart anatomical defects. And different from adults, abnormal rhythms occurring in the young can spontaneously disappear with progressive patient growth. Both supra- and ventricular tachyarrhythmias occur in the young although atrial rhythm abnormalities far exceed those of the ventricle. In both, pharmacologic therapies to alter tissue conduction and refractoriness remain the mainstay for initial intervention in the infant and young child, reserving more invasive and potentially harmful ablation therapies for drug-refractory cases. The purpose of the review is to present common and uncommon tachyarrhythmias which can occur in the fetus and throughout infancy. Emphasis will be placed on their electrocardiographic identification, recognition of any associated structural congenital heart defects and recommended pharmacologic management. Drug therapies will be divided according to mechanism of action and discussions of which particular agent is potentially best-suited to treat which specific tachyarrhythmia. A listing of current pharmacologic agents used in the young with appropriate dosages is included.
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