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Evaluation and treatment of pediatric patients with neurocardiogenic syncope
1St. Christopher's Hospital for Children, The Heart Center for Children, Erie Avenue at Front Street, 19134, Philadelphia, PA, USA
Insights
Neurocardiogenic syncope, the most common childhood fainting, stems from heart contractions and low blood volume. Diagnosis relies on history and sometimes tilt testing, with hydration and avoiding triggers as key treatments.
Area of Science:
- Pediatric Cardiology
- Autonomic Nervous System Disorders
- Cardiovascular Physiology
Background:
- Neurocardiogenic syncope is the most frequent cause of fainting in pediatric populations.
- The prevailing theory suggests it arises from intense cardiac contractions due to relative hypovolemia, stimulating C-fibers and causing sympathetic withdrawal.
Purpose of the Study:
- To elucidate the etiology and diagnostic approaches for neurocardiogenic syncope in children.
- To review established and emerging therapeutic strategies for managing pediatric neurocardiogenic syncope.
Main Methods:
- Diagnosis primarily relies on a detailed clinical history, characteristic prodromal symptoms, and upright positioning during episodes.
- Tilt table testing is utilized as an adjunctive diagnostic tool in select pediatric cases.
- Therapeutic interventions encompass lifestyle modifications, pharmacotherapy, and novel treatment modalities.
Main Results:
- A classic patient history is crucial for accurate diagnosis.
- Tilt testing can confirm the diagnosis in ambiguous cases.
- Effective management involves adequate hydration and avoidance of syncopal triggers.
Conclusions:
- The cornerstone of neurocardiogenic syncope management in children includes hydration and trigger avoidance.
- Pharmacological options like beta-blockers, fludrocortisone, alpha-adrenergic agents, and disopyramide are common.
- Emerging therapies include serotonin reuptake inhibitors, pacing with rate-drop algorithms, and tilt training.
Abstract:
Neurocardiogenic syncope is the most common form of syncope in children. The most widely accepted mechanism of its etiology is a vigorous contraction of the heart due to relative hypovolemia leading to stimulation of C-fibers and sympathetic withdrawal. Episodes usually occur with an upright position and are preceded by a typical prodrome. A classic history is paramount to the diagnosis. Tilt testing aids in the diagnosis in certain cases. The cornerstone of therapy is maintaining adequate hydration and avoiding situations that may lead to harm with syncopal events. Beta blockers, fludrocortisone, alpha adrenergic agents and disopyramide are commonly used to prevent syncope. Seratonin reuptake inhibitors, pacing with rate drop algorithms and tilt training are relatively new in the armamentarium of therapy.