[Syncope in children and adolescents: are the current guidelines being followed?]

Pediatric Syncope: Is the Diagnostic Guideline Implemented and Adhered to?

BACKGROUND

We sought to investigate adherence to the current pediatric syncope guideline in the emergency department and its impact on the frequency of missed or unnecessary diagnostic measures. For the first time, in 2014 updated guideline defines indispensable basic diagnostic measures and a consecutive algorithm for safe clinical decision making.

PATIENTS AND METHOD

We analyzed retrospectively 314 pediatric patients, 166 were presented before and 148 after publication of this guideline update.

RESULTS

After guideline publication, 54 patients (36.5%) were not treated in accordance with the guideline and 2 (0.63%) cases caused by epileptic seizures were initially misdiagnosed as reflex syncope. Among these 54 patients, 32 (59.3%) inpatient admissions were inappropriate, as well as 11 (20.4%) electroencephalographies, 4 (7.4%) sleep-deprivation EEGs, 2 (3.7%) magnetic resonance imaging, 5 (9.3%) urine diagnostics and 32 (59.3%) blood tests. In 21 cases (38.9%), the medical history was insufficient. ECG was missed in 42 patients (77.8%). There was no significant difference between the pre- and post-guideline groups concerning diagnostic work-up (p=0,12).

DISCUSSION

This non-compliance with the guideline did not cause a large number of misdiagnosed epileptic seizures (1.4%) or adverse outcomes but led to waste of resources in healthcare system and undue burdens on patients and their families.

CONCLUSION

In addition to establishment of clinical guidelines, the need for additional measures and strategies to promote their implementation seems obvious.

Clinical and Autonomic Profile, and Modified Calgary Score for Children and Adolescents with Presumed Vasovagal Syncope Submitted to the Tilt Test

BACKGROUND

In the pediatric population, syncope is mainly from vasovagal (VVS) origin. Its evaluation must be done by clinical methods, and the tilt test (TT) can contribute to the diagnosis.

OBJECTIVES

To analyze the clinical profile, Calgary and modified Calgary scores, response to TT and heart rate variability (HRV) of patients aged ≤ 18 years with presumed VVS. To compare the variables between patients with positive and negative responses to TT.

METHOD

Observational and prospective study, with 73 patients aged between 6 and 18 years, submitted to clinical evaluation and calculation of scores without previous knowledge of the TT. It was done at 70º under monitoring for HRV analysis. P-value < 0.05 was the statistical significance criterion.

RESULTS

Median age was 14.0 years; 52% of participants were female, 72 had Calgary ≥ -2 (mean 1.80), and 69 had modified Calgary ≥ -3 (mean 1.38). Prodromes were observed in 59 patients, recurrence in 50 and trauma in 19. The response to TT was positive in 54 participants (49 vasovagal, with 39 vasodepressor responses), with an increase in the low frequency (LF) component and a decrease in the high frequency (HF) component (p < 0,0001). In the supine position, LF was 33.6 in females and 47.4 in normalized units for males (p = 0.02). When applying the operating characteristic curve for positive TT, there was no statistical significance for HRV and scores.

CONCLUSION

Most children and adolescents with a presumed diagnosis of VVS presented a typical clinical scenario, with a Calgary score ≥ -2, and a predominant vasodepressor response to TT. Greater sympathetic activation was observed in the supine position in males. Calgary scores and sympathetic activation did not predict the response to TT.

Predictive value of EGSYS score in the differential diagnosis of cardiac syncope and neurally mediated syncope in children

Background and objective

Syncope is a common emergency with diverse etiologies in children. Among these, cardiac syncope (CS) is associated with high mortality and is usually difficult to diagnose. However, there is still no validated clinical prediction model to distinguish CS from other forms of pediatric syncope. The Evaluation of Guidelines in Syncope Study (EGSYS) score was designed to identify CS in adults and has been validated in several studies. In this study, we aimed to assess the ability of the EGSYS score in predicting CS in children.

Methods

In this retrospective study, we calculated and analyzed the EGSYS scores of 332 children hospitalized for syncope between January 2009 and December 2021. Among them, 281 were diagnosed with neurally mediated syncope (NMS) through the head-up tilt test, and 51 were diagnosed with CS using electrocardiography (ECG), echocardiography (ECHO), coronary computed tomography angiography (CTA), myocardial enzymes and genetic screening. The receiver operating characteristic (ROC) curve and Hosmer-Lemeshow test were used to evaluate the predictive value of the EGSYS score system.

Results

The median scores of 51 children with CS and 281 children with NMS were 4 [interquartile range (IQR): 3-5] and −1 (IQR: -2-1), respectively. The area under the ROC curve (AUC) was 0.922 [95% confidence interval (CI): 0.892-0.952; P &lt; 0.001], indicating that the EGSYS score system has good discrimination. The best cutoff point was ≥3, with a sensitivity and specificity of 84.3% and 87.9%, respectively. The Hosmer-Lemeshow test demonstrated satisfactory calibration (χ²=1.468, P &gt; 0.05) of the score, indicating a good fit of the model.

Conclusion

The EGSYS score appeared to be sensitive for differentiating CS from NMS in children. It might be used as an additional diagnostic tool to aid pediatricians in accurately identifying children with CS in the clinical practice.

Anxiety, depressive, and somatoform disorders in children and adolescents referred to paediatric cardiology with somatic symptoms

INTRODUCTION

Chest pain, palpitations, and syncope are among the most common referrals to paediatric cardiology. These symptoms generally have a non-cardiac aetiology in children and adolescents. The aim of this study was to investigate the rate of common psychiatric disorders in children and adolescents referred to the paediatric cardiology clinic with chest pain, palpitations, and syncope and the relationship between cardiological symptoms and psychiatric disorders.

METHODS

Children and adolescents aged 8-16 years who presented at the paediatric cardiology clinic with primary complaints of chest pain, palpitation, or syncope were included in the study. After a detailed cardiology examination, psychiatric disorders were assessed using the DSM IV-TR diagnostic criteria and a semi-structured interview scale (KSADS-PL). The Child Depression Inventory and Spielberger's State-Trait Anxiety Inventory for Children were also applied to assess the severity of anxiety and depression.

RESULTS

The study participants comprised 73 (68.90%) girls and 33 (31.10%) boys with a mean age of 12.5 ± 2.4 years. Psychiatric disorders were determined in a total of 48 (45.3%) participants; 24 (38.7%) in the chest pain group, 12 (48.0%) in the palpitation group, and 12 (63.2%) in the syncope group. Cardiological disease was detected in 17% of the cases, and the total frequencies of psychiatric disorders (p = 0.045) were higher in patients with cardiological disease.

CONCLUSION

It is clinically important to know that the frequency of psychiatric disorders is high in patients presenting at paediatric cardiology with chest pain, palpitations, and syncope. Physicians should be aware of patients' psychiatric problems and take a biopsychosocial approach in the evaluation of somatic symptoms.

Neurally Mediated Syncope in Children and Adolescents: An Updated Narrative Review

Syncope presents a proportion of up to 25% among children and adolescents and accounts for 0.9% of emergency room visits. Its most frequent aetiology is neurally mediated syncope, which includes vasovagal syncope and orthostatic hypotension. Up to 70% of the paediatric population with reflex syncope is female. There are usually precipitating factors and prodromes. This mini-review will discuss the particularities of the clinical presentation, diagnosis, modified Calgary score, indications and accuracy of the head-up tilt test, classification, and pathophysiology in four sequential phases. Prognostic data and the non-pharmacological and pharmacological approaches will also be reviewed and differences regarding reflex syncope in adults will be discussed.