Pediatric reflex syncope: updated insights and future directions

Area of Science:

• Pediatric Cardiology
• Autonomic Nervous System Disorders
• Syncope Management

Background:

• Reflex syncope is the most frequent cause of transient loss of consciousness in children.
• Initial evaluation requires clinical assessment and ECG to rule out cardiac origins.
• Conservative management with lifestyle modifications is effective for most cases.

Purpose of the Study:

• To propose a structured diagnostic pathway for pediatric reflex syncope.
• To emphasize excluding cardiac causes and phenotyping autonomic mechanisms.
• To guide individualized, mechanism-based treatment strategies.

Main Methods:

• Structured clinical evaluation and 12-lead ECG.
• Cardiac investigations (echocardiography, stress test, Holter) when cardiac syncope is suspected.
• Cardiovascular autonomic function assessment (ambulatory blood pressure monitoring, tilt test) for phenotyping.

Main Results:

• A stepwise diagnostic approach is proposed, escalating investigations based on suspicion of cardiac syncope or high-risk features.
• Autonomic function testing helps differentiate hypotensive and bradycardic mechanisms.
• Implantable loop recorders are indicated for unexplained syncope with high-risk criteria.

Conclusions:

• A structured diagnostic pathway is essential for pediatric reflex syncope, prioritizing cardiac cause exclusion.
• Education, lifestyle modifications (hydration, salt intake, counter-pressure maneuvers) are the cornerstone of management.
• Pharmacological or invasive treatments are reserved for recurrent or refractory cases.