ACC/AAP/AHA/ASE/HRS/SCAI/SCCT/SCMR/SOPE 2014 Appropriate Use Criteria for Initial Transthoracic Echocardiography in Outpatient Pediatric Cardiology

Detection of Right and Left Ventricular Dysfunction in Pediatric Patients Using Artificial Intelligence-Enabled ECGs

BACKGROUND

Early detection of left and right ventricular systolic dysfunction (LVSD and RVSD respectively) in children can lead to intervention to reduce morbidity and death. Existing artificial intelligence algorithms can identify LVSD and RVSD in adults using a 12-lead ECG; however, its efficacy in children is uncertain. We aimed to develop novel artificial intelligence-enabled ECG algorithms for LVSD and RVSD detection in pediatric patients.

METHODS AND RESULTS

We identified 10 142 unique pediatric patients (age≤18) with a 10-second, 12-lead surface ECG within 14 days of a transthoracic echocardiogram, performed between 2002 and 2022. LVSD was defined quantitatively by left ventricular ejection fraction (LVEF). RVSD was defined semiquantitatively. Novel pediatric models for LVEF ≤35% and LVEF <50% achieved excellent test areas under the curve of 0.93 (95% CI, 0.89-0.98) and 0.88 (95% CI, 0.83-0.94) respectively. The model to detect LVEF <50% had a sensitivity of 0.85, specificity of 0.80, positive predictive value of 0.095, and negative predictive value of 0.995. In comparison, the previously validated adult data-derived model for LVEF <35% achieved an area under the curve of 0.87 (95% CI, 0.84-0.90) for LVEF ≤35% in children. A novel pediatric model for any RVSD detection reached a test area under the curve of 0.90 (0.87-0.94).

CONCLUSIONS

An artificial intelligence-enabled ECG demonstrates accurate detection of both LVSD and RVSD in pediatric patients. While adult-trained models offer good performance, improvements are seen when training pediatric-specific models.

Assessment of 4D flow MRI for quantification of left-to-right shunt in pediatric patients with ventricular septal defect: comparison with right heart catheterization

Objectives

The percentage of shunt fraction significantly impacts the management of patients with congenital shunts, influencing strategic choices such as surgical or interventional procedures. This study compared the estimated shunt fraction (the ratio of pulmonary-to-systemic flow, Qp/Qs) for quantifying the left-to-right shunt in children with ventricular septal defect (VSD) using heart catheterization, four-dimensional (4D) flow, and two-dimensional (2D) flow magnetic resonance imaging (MRI). The goal was to establish a non-invasive and reliable measurement ratio between pulmonary and systemic blood flow in these patients.

Methods

Between July 2022 and June 2023, patients scheduled to undergo invasive right heart catheterization were included in this study. MRI was performed one hour before the catheterization procedure. The correlation of shunt fraction was assessed between all methods after calculating the Qp/Qs ratio from 2D and 4D flow MRI and catheterization.

Results

A total of 24 patients (aged 3-15 years, eight females) were ultimately included in the study. The Qp/Qs ratios obtained from 4D flow had a robust correlation (correlation coefficient r = 0.962) compared to those obtained during catheterization. Cardiac catheterization recorded the mean shunt fraction at 1.499 ± 0.396, while 4D flow measured it at 1.403 ± 0.344, with no significant difference between the two techniques. Moreover, there was a reasonable correlation (r = 0.894) between 2D flow measurements of Qp/Qs and the results obtained from catheterization, with a mean shunt fraction of 1.326 ± 0.283.

Conclusion

4D flow MRI has the potential to be a non-invasive method for accurately measuring the left-to-right shunt in children with VSD.

Two-Dimensional and Doppler trans-thoracic echocardiographic patterns of suspected pediatric heart diseases at Tibebe--Ghion specialized Teaching Hospital and Adinas General Hospital, Bahir Dar, North-west Ethiopia:-An experience from an LMIC

BACKGROUND

Transthoracic Echocardiography is the first-line, non-invasive, and accessible imaging modality to evaluate heart disease anatomy, physiology, and hemodynamics. We aim to describe the trans-thoracic echocardiography pattern of pediatric heart diseases and reasons for referral in children referred to Bahir Dar University Tibebe-Ghion Hospital and Adinas General Hospital.

METHOD

A descriptive cross-sectional study of the archived Transthoracic, Two Dimensional, and Doppler Echocardiography assessments of children from birth to fifteen years of age performed between June 2019 to May 2023 was done. Data were collected retrospectively from February 01, 2023 -May 31, 2023. Categorical variables like gender, referral reasons for echocardiography, and patterns of pediatric heart lesions were analyzed in the form of proportions and presented in tables and figures. Discrete variables including age were summarized as means (SD) and medians(IQR).

RESULTS

Out of 3,647 Children enrolled; 1,917 (52.6%) were males and 1,730 (47.4%) were females. The median (IQR) age of children enrolled was 24 months (5 to 96). Cardiac murmur (33%) was the most common reason for echocardiography followed by, Respiratory Distress (18%), Syndromic Child (15%), easy fatigability/ Diaphoresis (14.3%), congestive heart failure (14%), and rheumatic fever (13.2%). Congenital heart defect (CHD) accounts for 70% of all heart diseases, followed by rheumatic heart disease (21%). Isolated ventricular septal defect(VSD) was the most common CHD (21%) followed by isolated Patent ductus arteriosus (15%), isolated atrial septal defect (10%), Isolated atrioventricular septal defect (6%) and isolated pulmonary stenosis (5%). Cyanotic CHD accounts for 11.5% of all heart diseases. Tetralogy of Fallot (30%), d-TGA (20%), and double outlet right ventricle (19%) were the most common cyanotic CHDs.

CONCLUSIONS

In our study, congenital heart lesions are the most common diagnosis and cardiac murmurs are the most common presenting reasons for echocardiography evaluation.

The Utility of Screening Fetal Echocardiograms Following Normal Level II Ultrasounds in Fetuses with Maternal Congenital Heart Disease

INTRODUCTION

Fetal echocardiograms (F-echo) are recommended in all pregnancies when maternal congenital heart disease (CHD) is present, even if there was a prior level II ultrasound (LII-US) that was normal. The goal of this study was to evaluate if any diagnosis of a critical CHD was missed in a fetus with maternal CHD who had a normal LII-US.

METHODS

A retrospective chart review of all F-echoes where the indication was maternal CHD between 1/1/2015 to 12/31/2022 was performed. Fetuses were included if they had a LII-US that was read as normal and had an F-echo. Critical CHD was defined as CHD requiring catheterization or surgical intervention < 1 month of age.

RESULTS

A total of 296 F-echoes on fetuses with maternal CHD were evaluated, of which 175 met inclusion criteria. LII-US was performed at 19.8 ± 2.9 weeks gestational age and F-echo was performed at 24.2 ± 2.8 weeks gestational age. No patient with a normal LII-US had a diagnosis of a critical CHD by F-echo (negative predictive value = 100%). Evaluating those patients that had a negative LII-US, ten patients were diagnosed with non-critical CHD postnatally (negative predictive value = 94.3%). F-echo correctly diagnosed two of the ten missed LII-US CHD.

CONCLUSIONS

Critical CHD was not missed with a normal LII-US in this at risk population. F-echo also missed the majority of CHD when a LII-US was read as normal. A cost-benefit analysis of screening F-echo in fetuses with maternal CHD should be conducted if a normal LII-US has been performed.

Guidelines for Performing a Comprehensive Pediatric Transthoracic Echocardiogram: Recommendations From the American Society of Echocardiography

Echocardiography is a fundamental component of pediatric cardiology, and appropriate indications have been established for its use in the setting of suspected, congenital, or acquired heart disease in children. Since the publication of guidelines for pediatric transthoracic echocardiography in 2006 and 2010, advances in knowledge and technology have expanded the scope of practice beyond the use of traditional modalities such as two-dimensional, M-mode, and Doppler echocardiography to evaluate the cardiac segmental structures and their function. Adjunct modalities such as contrast, three-dimensional, and speckle-tracking echocardiography are now used routinely at many pediatric centers. Guidelines and recommendations for the use of traditional and newer adjunct modalities in children are described in detail in this document. In addition, suggested protocols related to standard operations, infection control, sedation, and quality assurance and improvement are included to provide an organizational structure for centers performing pediatric transthoracic echocardiograms.

Utility of Screening Fetal Echocardiograms at a Single Institution Following Normal Obstetric Ultrasound in Fetuses with Down Syndrome

Fetal echocardiograms (F-echo) are recommended in all pregnancies when the fetus has Down syndrome (DS) even if there was a prior obstetric scan (OB-scan) that was normal. The utility of a screening F-echo in this high-risk population when an OB-scan is normal is unknown. Goal of this study was to evaluate if any diagnosis of a critical congenital heart disease (CHD) was missed in a fetus with DS who had a normal OB-scan. Secondary goal was to determine if any CHD was missed postnatally when an OB-scan was read as normal. Retrospective chart review of all fetuses that had a F-echo whose indication was DS between 1/1/2010 to 6/30/2022 was performed. Fetuses were included if they had an OB-scan that was read as normal and had a F-echo. Postnatal transthoracic echocardiogram (pTTE) was reviewed when available. Critical CHD was defined as CHD requiring catheterization or surgical intervention < 1 month of age. One hundred twenty-two F-echo on fetuses with DS were evaluated, of which 48 met inclusion criteria. OB-scan was performed at 20.4 ± 4.5 weeks gestational age and F-echo was performed at 24.0 ± 4.6 weeks gestational age. No patient with a normal OB-scan had a diagnosis of a critical CHD by F-echo (n = 48, negative predictive value = 100%). Evaluating those patients that had an OB-scan and a pTTE (n = 38), 14 patients were diagnosed with CHD (muscular ventricular septal defect (VSD) n = 5, perimembraneous VSD n = 3, secundum atrial septal defect (ASD) n = 2, primum ASD n = 1, transitional atrioventricular septal defect (AVSD) n = 2, and aortic valve abnormality n = 1; negative predictive value = 63.2%). F-echo correctly diagnosed 4 of the 14 missed OB-scan CHD (perimembraneous VSD n = 2, muscular VSD n = 1, and transitional AVSD n = 1). Critical CHD was not missed with a normal OB-scan in this high-risk population. F-echo also missed the majority of CHD when an OB-scan was read as normal. The cost/benefit of screening F-echo in fetuses with DS should be evaluated if a normal OB-scan has been performed, considering all these patients would have a pTTE performed per guidelines.

Appropriateness of cardiovascular computed tomography and magnetic resonance imaging in patients with conotruncal defects

BACKGROUND

To promote the rational use of cardiovascular imaging in patients with congenital heart disease, the American College of Cardiology developed Appropriate Use Criteria (AUC), but its clinical application and pre-release benchmarks have not been evaluated. We aimed to evaluate the appropriateness of indications for cardiovascular magnetic resonance (CMR) and cardiovascular computed tomography (CCT) in patients with conotruncal defects and to identify factors associated with maybe or rarely appropriate (M/R) indications.

METHODS

Twelve centers each contributed a median of 147 studies performed prior to AUC publication (01/2020) on patients with conotruncal defects. To incorporate patient characteristics and center-level effects, a hierarchical generalized linear mixed model was used.

RESULTS

Of the 1753 studies (80% CMR, and 20% CCT), 16% were rated M/R. Center M/R ranged from 4 to 39%. Infants accounted for 8.4% of studies. In multivariable analyses, patient- and study-level factors associated with M/R rating included: age <1 year (OR 1.90 [1.15-3.13]), truncus arteriosus (vs. tetralogy of Fallot, OR 2.55 [1.5-4.35]), and CCT (vs. CMR, OR 2.67 [1.87-3.83]). None of the provider- or center-level factors reached statistical significance in the multivariable model.

CONCLUSIONS

Most CMRs and CCTs ordered for the follow-up care of patients with conotruncal defects were rated appropriate. However, there was significant center-level variation in appropriateness ratings. Younger age, CCT, and truncus arteriosus were independently associated with higher odds of M/R rating. These findings could inform future quality improvement initiatives and further exploration of factors resulting in center-level variation.

Telehealth and Application of Appropriate Use Criteria for Pediatric Transthoracic Echocardiography

Appropriate use criteria (AUC) for the performance of outpatient transthoracic echocardiography are based on history, physical examination and electrocardiograms. Telehealth provides access to clinical care in the absence of a physical examination. We assessed application of AUC for performance of echocardiography following a telehealth visit. In this single center study, we retrospectively reviewed the charts of pediatric patients whose originally scheduled in person visits were converted to telehealth visits between March and May 2020. Patients were referred for echocardiogram by the telehealth cardiologist. Echocardiograms requested during the telehealth visit were retrospectively classified as appropriate [A], may be appropriate [M], or rarely appropriate [R] by two independent reviewers. Findings from the echocardiogram were classified as normal, abnormal, or abnormal and motivating treatment by the same two independent reviewers based upon results from the echocardiogram report and physician office visit note. Of the 441 patients seen by telehealth, interquartile range of 1.9-15.3 years, 114 (26%) patients were referred for an echocardiogram. Of the patients for whom echocardiograms were requested, 56/114 (49%) were new to cardiology. Echocardiograms were rated: A-85 (75%), M-5 (4%), and R-24 (21%). Of the 108 completed studies, 61 (56%) were normal, 44 (41%) were abnormal, and three (3%) were abnormal motivating treatment. Abnormal TTE findings were not detected in the R encounters compared with abnormal findings in 46/82 (56%) of the A completed studies. Seventy-one percent (15/21) of the R-rated studies were performed for murmur evaluation.

The change in pediatric subject symptoms during the COVID-19 pandemic in China: an increase in cardiac consultation

BACKGROUND

It is reported that the adverse impact of nonpharmaceutical interventions (NPIs) on the mental health of children and adolescents may lead to psychologically related disorders during the coronavirus disease 2019 (COVID-19) period. Subject symptoms such as chest pain, chest tightness, and palpitation may be related to increased stress and anxiety in children and adolescents. The present research aimed to determine the number of pediatric consults and etiology of subject symptoms during the COVID-19 pandemic period and compared it with the same timelines in 2019 and 2021 to discuss the impact of different periods on the organic disease onset of children with subject symptoms, especially in cardiac involvement.

METHODS

Children who visited Qingdao Women and Children's Hospital, Qingdao University between January 23 to April 30, 2019 (pre-COVID-19 period), January 23 to April 30, 2020 (COVID-19 period), and January 23 to April 30, 2021 (post-COVID-19 period) presenting chest pain, chest tightness, and palpitation were recruited. Information to determine gender, age, medical history, department for the initial visit, clinical manifestations, time from the latest onset to the visit, and diagnosis were recorded.

RESULT

A total of 891 patients were enrolled in the present study (514 males; median age: 7.72). One hundred twenty-three patients presented during the pre-COVID-19 period while 130 during the COVID-19 period, nevertheless, the number substantially increased during the post-COVID-19 period (n = 638). Cardiac etiology accounted for 1.68% (n = 15) of the patient population, including arrhythmias (n = 10, 1.12%), myocarditis (n = 4, 0.44%), and atrial septal defect (n = 1, 0.11%). There was no significant difference among groups in the distribution of organic etiology. The median time from the latest onset to the visit during the pre-COVID-19 period was 7 days compared to 10 days during the COVID-19 period and 3 days during the post-COVID period.

CONCLUSION

During the post-COVID-19 period, the median time from the latest onset to the visit was significantly shorter than that in the pre-COVID-19 period or COVID-19 period. The pediatric consult of children with subject symptoms presented increased substantially during the post-COVID-19 period, while there was no significant difference in the number of patients involving the cardiac disease. Clinicians ought to be more careful to screen heart diseases to prevent missed diagnosis and misdiagnosis during special periods.

Impact of the COVID pandemic on quality measures in a pediatric echocardiography lab

Background

The COVID pandemic necessitated an altered approach to transthoracic echocardiography, especially in COVID cases. Whether this has effected echocardiography lab quality is unknown.

Objectives

We sought to determine whether echocardiography lab quality measures during the COVID pandemic were different from those prior to the pandemic and whether quality and comprehensiveness of echocardiograms performed during the pandemic was different between COVID and non-COVID patients.

Methods

The four quality measures (diagnostic errors, appropriateness of echocardiogram, American College of Cardiology Image Quality metric and Comprehensive Exam metric in structurally normal hearts) reported quarterly in our lab were compared between two quarters during COVID (2020) and pre-COVID (2019). Each component of these metrics was also assessed in randomly selected echocardiograms in COVID patients and compared to non-COVID echocardiograms.

Results

For non-COVID echocardiograms, the image quality metric did not change between 2019 and 2020 and the comprehensive exam metric improved. Diagnostic error rate did not change, and appropriateness of echocardiogram indications improved. When COVID and non-COVID echocardiograms were compared, the image quality metric and comprehensiveness exam metric were lower for COVID cases (image quality mean 21.3/23 for non-COVID, 18.6/23 for COVID, p < 0.001 and comprehensive exam mean 29.5/30 for non-COVID, 27.7/39 for COVID, p < 0.001). In particular, systemic and pulmonary veins, pulmonary arteries and aortic arch were not adequately imaged in COVID patients. For studies in which a follow-up echocardiogram was available, no new pathology was found.

Conclusions

At our center, though diagnostic error rate did not change during the pandemic and the proportion of echocardiograms ordered for appropriate indications increased, imaging quality in COVID patients was compromised, especially for systemic and pulmonary veins, pulmonary arteries and arch. Though no new pathology was noted on the small number of patients who had follow-up studies, we are paying careful attention to these structures to avoid diagnostic errors going forward.

Implementation of Appropriate Use Criteria for Transthoracic Echocardiography in Follow up Care of Pediatric Patients with Congenital Heart Disease

BACKGROUND

Indications for transthoracic echocardiography (TTE) from the 2020 Appropriate Use Criteria (AUC) for congenital heart disease (CHD) were incorporated into our electronic ordering system as a clinical decision support tool. The purpose of this study was to evaluate TTE utilization and factors affecting appropriateness of TTE orders during follow-up care of patients with CHD.

METHODS

All TTEs performed during follow-up clinic visits from 5/1/2020 to 11/30/2020 were included. TTE indications were rated appropriate (A), may be appropriate (M), or rarely appropriate (R) based on the AUC, and unclassifiable if indication was not in the document but related to included lesions. CHD was graded as simple, moderate, and complex based on Bethesda classification. Logistic regression was used to determine association of ratings with patient age, insurance status, CHD complexity, clinician experience and specialty.

RESULTS

Of the 5158 studies, 3979 (77.2%) were for CHD included in the AUC document, 322 (8%) were unclassifiable, 37 (0.7%) for CHD not in the document, and 1142 (22.1%) for non-CHD indications. Of the 3657 TTEs to which AUC ratings could be applied, 95.6% were A, 2.4% M, and 2.0% R. The highest utilization of TTE was for follow-up of ventricular septal defects, left ventricular outflow tract obstruction, and single ventricles; 46% for unrepaired CHD; 78% for routine surveillance and the remaining for a change in clinical status. On multivariable analysis, the only significant factor associated with M/R ratings was simple CHD [OR 11.58 (95% CI 5.36 - 24.98), p<0.001].

CONCLUSIONS

Three-quarters of the TTEs ordered during follow-up care in pediatric cardiology clinics are for indications related to CHD. Most TTEs for follow-up of CHD were for routine surveillance and indications rated A. TTE orders for M/R ratings were associated with simple CHD. Though the 2020 AUC document successfully stratifies majority of indications related to CHD, future documents should consider the unclassifiable CHD indications and the non-CHD indications.

A Survey of Pediatric Cardiologists Regarding Non-emergent Echocardiographic Findings in Asymptomatic Newborns

Echocardiography is often used to assess for significant heart disease in newborns, but there is little information on how to best manage non-emergent echocardiographic findings in asymptomatic babies. We reviewed the literature regarding the natural history of a patent foramen ovale (PFO), atrial septal defect (ASD), ventricular septal defect (PFO), and patent ductus arteriosus (PDA). We surveyed pediatric cardiologists to determine their recommendations for ten echocardiographic findings (PFO, 3 mm ASD, 6 mm ASD, small muscular VSD, small perimembranous VSD, small PDA with left to right shunting, small PDA with bidirectional shunting, trivial mitral insufficiency, trivial aortic insufficiency, and a normally functioning bicuspid aortic valve) in an asymptomatic one-day old with a heart murmur. These ten findings were set in three clinical contexts (an otherwise normal term baby, a baby born at 34 weeks gestation, and a term baby with trisomy 21). 149 survey responses were evaluated. Follow-up was universally recommended for those babies with a 6 mm ASD, a perimembranous VSD and a bicuspid aortic valve and frequently recommended for newborns with a 3 mm ASD, a small muscular VSD and any PDA. Depending on the context, between 17.5 and 23% of respondents recommended follow-up for an isolated PFO. Follow-up typically included repeat echocardiography. Some form of follow-up, typically with repeat echocardiography was recommended for many asymptomatic day-old newborns who had echocardiographic findings which were unlikely to be clinically significant. Given the wide range of recommendations, a consensus guideline could prove useful to clinicians.

Usefulness of Postnatal Echocardiograms in Patients with Omphaloceles Who Previously Had a Normal Fetal Echocardiogram

INTRODUCTION

Neonates with omphaloceles routinely have a transthoracic echocardiogram (TTE) performed due to a high association with congenital heart defects (CHD). The utility of a TTE in these patients with a normal fetal echocardiogram is unknown. The primary objective of this study was to determine whether a critical CHD diagnosis was missed in patients with an omphalocele who had a normal fetal echocardiogram. The secondary objective of the study was to determine whether any CHD diagnosis was missed postnatally when a fetal echocardiogram was read as normal.

METHODS

A retrospective chart review was performed of patients with omphaloceles born between January 1, 2008, and June 30, 2020. Patients were included if they had a fetal echocardiogram that was read as normal and had a postnatal echocardiogram performed. Baseline demographics, postnatal data echocardiographic findings, and hospital course were collected. Critical CHD was defined as CHD requiring neonatal cardiac intervention.

RESULTS

Fifty-six fetal echocardiograms on patients with omphaloceles were performed, of which 24 patients met the inclusion criteria. No patient was diagnosed with a critical CHD postnatally (negative predictive value [NPV] = 100%). Two patients were diagnosed with ventricular septal defects (VSD) postnatally (NPV = 91.7%). One of the VSDs required closure with a patch at 4 months of life, while the other, a small muscular VSD, closed spontaneously within the first year of life. Both patients had a murmur on exam during their initial hospital stay. The patient that required surgery also had an abnormal electrocardiogram and chest X-ray. There were no mortalities due to cardiac causes in these patients.

CONCLUSION

Critical CHD was not missed on any patient with an omphalocele who had a normal fetal echocardiogram. All other patients with omphaloceles who had CHD diagnosed postnatally had an abnormal clinical finding on postnatal evaluation. The routine performance of a postnatal TTE in patients with an omphalocele who had a normal fetal echocardiogram may not be needed in those with a normal clinical workup. Further studies evaluating echocardiographic imaging recommendations are needed to maximize care and optimize resource allocation in this complex patient population.

Development of Mobile Application for Assessment of Basic Echocardiographic Parameters in Apparently Healthy Population

Background: Development of tools, making for easier assessment of the age- and body size-specific echocardiographic parameters in the general population, becomes increasingly important. Materials and Methods: The application was developed on the basis of the previously designed model of normal values for basic echocardiographic parameters. The source population for the normal values was 10,604 apparently healthy people aged from 1 day to 65 years old, in which optimal visualization of the heart in the parasternal and apical echocardiographic views could be obtained. The whole population surveyed was categorized into three age groups. The predicted parameters were calculated by the group-specific regression equations. Deviation from the norm for one or another echocardiographic parameter was determined based on the value of z-score. Results: The mobile application was designed for the medical community and allows for a selective assessment of basic echocardiographic parameters in apparently healthy people with high accuracy. The application has a friendly graphical interface and provides color output on display of the results obtained. Discussion: The value of this application is in its uniqueness, since having analyzed available scientific works on mobile applications in medicine we could hardly find similar developments. Conclusions: Using the mobile application can save a doctor's time by simplifying the process of entering initial data, automating calculations, and providing convenient displaying of results. From this perspective, the application developed can become a useful tool in the sphere of telemedicine, in particular-the mobile medicine for remote consultation of patients.

Implementation of appropriate use criteria for cardiology tests and procedures: a systematic review and meta-analysis

AIMS

The American College of Cardiology appropriate use criteria (AUC) provide clinicians with evidence-informed recommendations for cardiac care. Adopting AUC into clinical workflows may present challenges, and there may be specific implementation strategies that are effective in promoting effective use of AUC. We sought to assess the effect of implementing AUC in clinical practice.

METHODS AND RESULTS

We conducted a meta-analysis of studies found through a systematic search of the MEDLINE, Web of Science, Cochrane, or CINAHL databases. Peer-reviewed manuscripts published after 2005 that reported on the implementation of AUC for a cardiovascular test or procedure were included. The main outcome was to determine if AUC implementation was associated with a reduction in inappropriate/rarely appropriate care. Of the 18 included studies, the majority used pre/post-cohort designs; few (n = 3) were randomized trials. Most studies used multiple strategies (n = 12, 66.7%). Education was the most common individual intervention strategy (n = 13, 72.2%), followed by audit and feedback (n = 8, 44.4%) and computerized physician order entry (n = 6, 33.3%). No studies reported on formal use of stakeholder engagement or 'nudges'. In meta-analysis, AUC implementation was associated with a reduction in inappropriate/rarely appropriate care (odds ratio 0.62, 95% confidence interval 0.49-0.78). Funnel plot suggests the possibility of publication bias.

CONCLUSION

We found most published efforts to implement AUC observed reductions in inappropriate/rarely appropriate care. Studies rarely explored how or why the implementation strategy was effective. Because interventions were infrequently tested in isolation, it is difficult to make observations about their effectiveness as stand-alone strategies.

STUDY REGISTRATION

PROSPERO 2018 CRD42018091602. Available from https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42018091602.

Appropriate use of echocardiography for palpitations in paediatric cardiology clinics

OBJECTIVES

Identify diagnostic yield and frequency of echocardiograms for palpitation-related indications at outpatient paediatric cardiology clinics in relation to the 2014 ACC/AAP/AHA/ASE/HRS/SCAI/SCCT/SCMR/SOPE appropriate use criteria for Initial Transthoracic Echocardiography in Outpatient Paediatric Cardiology.

STUDY DESIGN

A single-centre, retrospective study of children presenting for evaluation of a chief complaint of palpitations to outpatient paediatric cardiology clinics from 2015 to 2017. Palpitations were defined as an unpleasant sensation of rapid, irregular, and/or forceful beating of the heart. Indications for echocardiogram in patients were retrospectively classified based on the appropriate use criteria as "appropriate," "may be appropriate," or "rarely appropriate." The incidence of abnormal and incidental echocardiographic findings for each category was determined.

RESULTS

A total of 286 patients presented with palpitations, with 128 (52% female) meeting inclusion criteria. Exclusion criteria included patients with additional cardiac complaints, prior echocardiogram, or history of congenital heart disease. Echocardiograms were performed on 36 (28%) patients. The appropriate use criteria were retrospectively applied, and indications for their performance were classified as "appropriate" (n = 4), "may be appropriate" (n = 17), or "rarely appropriate" (n = 15). Minor echocardiographic abnormalities were present in 22% (n = 8) of echocardiograms obtained for all appropriate use criteria classifications. No moderate or severe echocardiographic abnormalities were found. Incidental findings were noted in eight echocardiograms.

CONCLUSION

Echocardiography in the evaluation of "rarely appropriate" and "may be appropriate" palpitation-related indications is of low diagnostic yield.

Transthoracic echocardiography: from guidelines for humans to cardiac ultrasound of the heart in rats

Ultrasound examination of the heart is a cornerstone of clinical evaluation of patients with established or suspected cardiovascular conditions. Advancements in ultrasound imaging technology have brought transthoracic echocardiography to preclinical murine models of cardiovascular diseases. The translational potential of cardiac ultrasound is critically important in rat models of myocardial infarction and ischemia-reperfusion injury, congestive heart failure, arterial hypertension, cardiac hypertrophy, pulmonary hypertension, right heart failure, Takotsubo cardiomyopathy, hypertrophic and dilated cardiomyopathies, developmental disorders, and metabolic syndrome. Modern echocardiographic machines capable of high-frame-rate image acquisition and fitted with high-frequency transducers allow for cardiac ultrasound in rats that yields most of the echocardiographic measurements and indices recommended by international guidelines for cardiac ultrasound in human patients. Among them are dimensions of cardiac chambers and walls, indices of systolic and diastolic cardiac function, and valvular function. In addition, measurements of cardiac dimensions and ejection fraction can be significantly improved by intravenous administration of ultrasound enhancing agents (UEAs). In this article we discuss echocardiography in rats, describe a technique for minimally invasive intravenous administration of UEAs via the saphenous vein and present a step-by-step approach to cardiac ultrasound in rats.

ACC/AHA/ASE/HRS/ISACHD/SCAI/SCCT/SCMR/SOPE 2020 Appropriate Use Criteria for Multimodality Imaging During the Follow-Up Care of Patients With Congenital Heart Disease: A Report of the American College of Cardiology Solution Set Oversight Committee and Appropriate Use Criteria Task Force, American Heart Association, American Society of Echocardiography, Heart Rhythm Society, International Society for Adult Congenital Heart Disease, Society for Cardiovascular Angiography and Interventions, Society of Cardiovascular Computed Tomography, Society for Cardiovascular Magnetic Resonance, and Society of Pediatric Echocardiography

The American College of Cardiology (ACC) collaborated with the American Heart Association, American Society of Echocardiography, Heart Rhythm Society, International Society for Adult Congenital Heart Disease, Society for Cardiovascular Angiography and Interventions, Society of Cardiovascular Computed Tomography, Society for Cardiovascular Magnetic Resonance, and the Society of Pediatric Echocardiography to develop Appropriate Use Criteria (AUC) for multimodality imaging during the follow-up care of patients with congenital heart disease (CHD). This is the first AUC to address cardiac imaging in adult and pediatric patients with established CHD. A number of common patient scenarios (also termed "indications") and associated assumptions and definitions were developed using guidelines, clinical trial data, and expert opinion in the field of CHD.1 The indications relate primarily to evaluation before and after cardiac surgery or catheter-based intervention, and they address routine surveillance as well as evaluation of new-onset signs or symptoms. The writing group developed 324 clinical indications, which they separated into 19 tables according to the type of cardiac lesion. Noninvasive cardiac imaging modalities that could potentially be used for these indications were incorporated into the tables, resulting in a total of 1,035 unique scenarios. These scenarios were presented to a separate, independent panel for rating, with each being scored on a scale of 1 to 9, with 1 to 3 categorized as "Rarely Appropriate," 4 to 6 as "May Be Appropriate," and 7 to 9 as "Appropriate." Forty-four percent of the scenarios were rated as Appropriate, 39% as May Be Appropriate, and 17% as Rarely Appropriate. This AUC document will provide guidance to clinicians in the care of patients with established CHD by identifying the reasonable imaging modality options available for evaluation and surveillance of such patients. It will also serve as an educational and quality improvement tool to identify patterns of care and reduce the number of Rarely Appropriate tests in clinical practice.

Factors Influencing Temporal Trends in Pediatric Inpatient Imaging Utilization

BACKGROUND

Concern exists over exponential growth in cardiac imaging in adults, but there is paucity of such data for cardiac imaging trends in pediatric patients. The aims of this study were to determine temporal trends in the use of noninvasive cardiac imaging and compare these with trends in the use of noncardiac imaging and to identify factors influencing those trends using the Pediatric Health Information Service database.

METHODS

Pediatric inpatient encounter data from January 2004 to December 2017 at 35 pediatric hospitals were extracted from the Pediatric Health Information Service database. Temporal imaging utilization trends in cardiac and noncardiac ultrasound or echocardiography, magnetic resonance imaging (MRI), and computed tomography (CT) were assessed using linear mixed-effects models. Models were adjusted for case-mix index, complex chronic conditions, patient age, length of stay, payer source, and cardiac surgical volume.

RESULTS

A total of 5,869,335 encounters over 14 years were analyzed (median encounters per center per year, 11,411; median patient age, 4 years; median length of stay, 3 days). From 2004 to 2017, the rates of pediatric inpatient cardiac and noncardiac ultrasound and MRI increased, whereas the rate of noncardiac CT decreased. Cardiac CT use increased beginning in 2014 (+0.264 cardiac CT encounters per 1,000 encounters per year), surpassing the rate of rise of cardiac MRI. Case-mix index, cardiac surgical volume, and payer source affected the largest number of imaging trends.

CONCLUSIONS

Among pediatric inpatients, utilization of cardiac and noncardiac ultrasound and MRI has steadily increased. Noncardiac CT use declined and cardiac CT use increased after 2014. Factors influencing imaging trends include case-mix index, cardiac surgical volume, and payer source. This study lays a foundation for investigations of imaging-related resource utilization and outcomes among pediatric inpatients.

Recommendations for exercise and screening for safe athletic participation in hypertensive youth

Physical activity is an important component of ideal cardiovascular health. Current guidelines recommend that youth with hypertension participate in competitive sports once hypertensive target organ effects and risks have been assessed and that children with hypertension receive treatment to lower BP below stage 2 thresholds (e.g., < 140/90 mmHg or < 95th percentile + 12 mmHg) before participating in competitive sports. Despite these recommendations, pediatricians and pediatric subspecialists continue to struggle with how best to counsel their patients regarding appropriate forms of physical activity, the impact of exercise on blood pressure, and how best to screen for cardiovascular conditions that place youth at risk for sudden cardiac death. This review provides a summary of our current knowledge regarding the safety and utility of exercise in the management of high blood pressure in youth. We review determinants of blood pressure during exercise, the impact of blood pressure on cardiovascular health and structure, mechanisms for assessing cardiometabolic fitness (e.g., exercise stress test), contraindications to athletic participation, and how best to plan for athletic participation among hypertensive youth. Greater knowledge in these areas may offer clarity to providers faced with the challenge of prescribing exercise recommendations for hypertensive youth.

Impact of Clinician Engagement on Implementation of the Pediatric Echocardiography Appropriate Use Criteria

We sought to determine whether awareness of the pediatric appropriate use criteria (AUC) affected transthoracic echocardiogram (TTE) ordering by cardiologists; evaluate for differences in classification of an encounter's AUC clinical scenario by investigator chart review compared with clinicians at the time of the encounter; and assess TTE yield by appropriateness rating. AUC clinical scenario(s) were assigned to patients without prior TTE by investigator chart review of visits in 2014 (n = 209) and 2016 (n = 199), and by clinician classification in 2016 (n = 671). Investigators documented TTE utilization and findings. Between 2014 and 2016, TTE utilization decreased from 54 to 33% (p < 0.001) of "rarely appropriate" (R) encounters, resulting in a decrease in overall TTE utilization from 73 to 55% of encounters (p < 0.001). There was only moderate agreement of AUC appropriateness by investigator chart review and clinician classification (κ = 0.533, p < 0.001). Abnormal TTE findings were detected in 18.7% of R encounters, with 21 of 24 abnormalities in infants younger than 4 months presenting with murmur. A decrease in TTE utilization for R encounters may represent a change in practice from increased awareness of the AUC. AUC scenario classification by clinicians at the time of the encounter could be superior to chart review. TTE abnormalities may be missed in infants younger than 4 months of age when evaluated for murmurs with the AUC.

The Utility of Echocardiography in Pediatric Patients with Structurally Normal Hearts and Suspected Endocarditis

The objective of this study was to evaluate the utility of transthoracic echocardiography (TTE) in children with structurally normal hearts suspected of having infective endocarditis (IE). We hypothesized that the diagnostic yield of TTE is minimal in low-risk patients with normal hearts. We performed a retrospective chart review of TTEs performed for concern for endocarditis at a pediatric tertiary care referral center in Portland, Oregon. Three hundred patients met inclusion criteria (< 21 years old, completed TTE for IE from 2005 to 2015, no history of congenital heart disease or endocarditis). We recorded findings that met the modified Duke criteria (MDC) including fever, positive blood culture, and vascular/immunologic findings; presence of a central line; whether or not patients were diagnosed with IE clinically; and if any changes to antibiotic regimens were made based on TTE. Ten patients (3%) had echocardiograms consistent with IE. When compared to the clinical diagnosis of IE, the positive predictive value (PPV) of one positive blood culture without other major/minor MDC was 0. Similarly, the PPV of two positive blood cultures without other major/minor criteria was 0.071. Patients should be evaluated using the MDC to assess the clinical probability of IE prior to performing a TTE. Patients with a low probability for IE should not undergo TTE as it has a low diagnostic yield and patients are unlikely to be diagnosed with disease.

Usefulness of Postnatal Echocardiography in Patients with Down Syndrome with Normal Fetal Echocardiograms

The objective of this study is to evaluate if the diagnosis of a complex congenital heart disease (CHD) was missed in a patient with Down syndrome (DS) who had a fetal echocardiogram that was read as normal. Secondary goal of this study was to determine if any CHD was missed postnatally when a fetal echocardiogram was read as normal. A retrospective chart review of children with DS at Nationwide Children's Hospital whose birthdates were between 1/1/2010 and 12/31/2017 was performed. Patients were included if they had a fetal echocardiogram that was read as normal and also had a postnatal echocardiogram performed. One hundred twenty fetal echocardiograms on patients with DS were performed, of which 45 patients met the inclusion criteria. No patient was diagnosed with a complex CHD postnatally, with a negative predictive value = 100%. Thirteen patients were diagnosed with CHD postnatally, with a negative predictive value of 71.1%. All 13 patients had either a murmur (11) or an abnormal EKG (9). One patient died at 8 days of life due to pulmonary hypertension complications. Five patients had resolution of their CHD, 2 patients have near resolution, 2 patients are being followed for their atrial septal defects and 3 underwent intervention (septum primum surgical repair = 1, PDA catheter occlusion = 2). Complex CHD was not missed on any fetal echocardiograms performed on patients with DS. All the other patients who had CHD diagnosed postnatally had an abnormal finding on evaluation. Further studies evaluating echocardiographic imaging recommendations are needed to maximize care in this patient population.

A Primer on Multimodal Imaging and Cardiology-Radiology Congenital Heart Interface

Pediatric cardiology imaging laboratories in the present day have several modalities for imaging of congenital and acquired cardiovascular disease. These modalities include echocardiography, cardiovascular magnetic resonance imaging, cardiac computed tomography and nuclear imaging. The utility and limitations of multimodal imaging is described herein along with a framework for establishing a cardiology-radiology interface.

Comparison of Initial Pediatric Outpatient Echocardiogram Indications between Community and Academic Practice

OBJECTIVE

To compare the appropriateness and diagnostic yield of initial outpatient transthoracic echocardiography (TTE) between a community pediatric cardiology practice and an academic children's hospital.

STUDY DESIGN

Initial outpatient pediatric TTE ordered by pediatric cardiologists between January and March 2014 at a community practice (Packard Children's Health Alliance [PCHA]; n = 238) and an academic tertiary center (Lucile Packard Children's Hospital [LPCH]; n = 76) were evaluated based on appropriate use criteria (AUC) released in December 2014. Multivariate logistic regression was used to identify predictors of "rarely appropriate" indications and abnormal TTE findings.

RESULTS

Of 314 TTEs, 165 (52.5%) were classified as "appropriate," 40 (12.7%) were classified as "may be appropriate," 100 (31.9%) were classified as "rarely appropriate," and 9 (2.9%) were unclassifiable. The proportion of abnormal findings did not differ between the 2 practice settings (5.3% for LPCH vs 7.6% for PCHA; P = .61). TTEs performed at PCHA were significantly more likely to be "rarely appropriate" (OR, 2.57; 95% CI, 1.28-5.15; P = .008). Children aged <1 year (OR, 1.90; 95% CI, 1.03-3.50; P = .04) and ordering providers with <10 years since the completion of their fellowship (OR, 2.15; 95% CI, 1.20-3.87; P = .01) were associated with "rarely appropriate" indications. "Appropriate" TTEs were associated with abnormal findings (OR, 8.69; 95% CI, 1.77-42.68; P = .008).

CONCLUSION

The community practice was independently associated with greater inappropriate ordering of initial outpatient pediatric TTEs compared with the academic practice. The assessment of practice patterns following AUC release should account for physician and practice-related factors that could influence differences in TTE ordering patterns.

Does Echocardiography Have a Role in the Cardiologist's Diagnosis of Innocent Murmurs in Childhood?

BACKGROUND

Innocent murmurs are common in childhood. Echocardiography may diagnose almost all congenital cardiac abnormalities. Earlier studies have suggested that it may be unnecessary when a clinical diagnosis of an innocent murmur is made by an experienced cardiologist. Yet, echocardiography is commonly performed despite such a diagnosis. Is that justifiable?

METHODS

Patients referred to a paediatric cardiologist for evaluation of a murmur were assessed. If an innocent murmur was clinically diagnosed, an echocardiogram and an electrocardiogram were ordered when requested. The cardiologist completed a questionnaire documenting the reasons for the investigations and his degree of confidence in the clinical diagnosis. The parents and patients were informed of the diagnosis and the results of the investigations.

RESULTS

In almost all 62 cases whose murmurs were clinically considered to be innocent, the referring doctor expected an echocardiogram to be performed. Following echocardiography, one patient was found to have a small muscular ventricular septal defect. On review, the murmur was consistent with that diagnosis. Three (3) others had abnormal echocardiograms namely congenitally corrected transposition of great arteries, partial anomalous right upper lobe pulmonary vein, and left ventricular non-compaction. All on review were still considered clinically to have innocent murmurs.

CONCLUSIONS

Despite the competency of the cardiologist, echocardiography diagnosed important but relatively uncommon cardiac abnormalities with prognostic implications that would have been missed if only the clinical examination was performed. Over and above the referring doctor's expectations for an echocardiogram to be performed is the need for the cardiologist to provide a complete and definitive diagnosis.

Electrocardiographic and echocardiographic evaluation of a large cohort of peri-pubertal soccer players during pre-participation screening

BACKGROUND

The early diagnosis of cardiac abnormalities in young athletes may be helpful not only to identify subjects potentially at risk of sudden cardiac death but also to prevent stress-related cardiac dysfunction and cardiovascular events during the life of these subjects. The aim of our study was to investigate the prevalence of cardiac abnormalities in a population of young male soccer players undergoing pre-participation screening through electrocardiogram and trans-thoracic echocardiography.

METHODS

All consecutive male football players undergoing pre-participation screening comprehensive of medical history, physical examination, 12-lead electrocardiogram and trans-thoracic echocardiography at the FMSI Sport Medicine Institute in Rome between January 2008-March 2009 were enrolled in the study.

RESULTS

Overall, 2261 consecutive young athletes aged 12.4 ± 2.6 years were evaluated. Training-unrelated electrocardiogram abnormalities were observed in 65 (2.9%) athletes. Abnormal trans-thoracic echocardiography was observed in 102 athletes (4.5%), including two cases of hypertrophic cardiomyopathy, eight of mild left ventricular hypertrophy, six of mild left ventricular dilation and 17 of bicuspid aortic valve. An abnormal electrocardiogram was associated with anomalous trans-thoracic echocardiography in 11/65 (16.9%) cases. All athletes requiring sport disqualification were identified by electrocardiogram. Notably, among 2216 athletes with a normal electrocardiogram, 91 had abnormal trans-thoracic echocardiography, including six cases of left ventricular dilation and six of ventricular hypertrophy.

CONCLUSIONS

In a wide population of peri-pubertal male athletes, evaluation of the electrocardiogram identified all cardiac diseases requiring sport disqualification. Trans-thoracic echocardiography alone allowed the identification of cardiac abnormalities potentially leading to cardiomyopathies or major cardiovascular events over time.

Effects of Watching Cartoons During an Echocardiography on Infants and Preschool Children. A Prospective Randomized Study

Echocardiography is currently the main diagnostic technique in pediatric cardiology, but sometimes it is difficult to use in very young children, as a complete and accurate study depends on the patient's and family's cooperation. Children's behavior is one of the main problems for this procedure, and interventions like sedative medication have been used to facilitate its performance. The aim of this study was to analyze the effects of TV entertainment in infants and preschool children during echocardiography. We designed an experimental study in children with a heart murmur. An examination room was prepared with a TV on the ceiling, giving the children an unobstructed view during the echocardiography procedure. Fifty-eight patients were randomized into two groups: TV intervention vs. usual care (consisting of other distraction measures). The primary outcome was echocardiography time, but we also assessed blood pressure, quality of technique, child behavior, and parents' stress level. The TV group showed a statistically significant reduction in duration of the echocardiography and systolic and diastolic blood pressure, as well as better quality of technique and child behavior. Consequently, we recommend the use of a TV as a simple and useful distraction method for improving echocardiography in young children.

Innocent Heart Murmur

Heart murmur is the most common reason for a referral to a pediatric cardiologist. Virtually all children have a heart murmur during their childhood. Less than 1% of murmurs are pathological in children. Innocent/functional heart murmur is the most common type of heart murmur. There are multiple theories proposed to identify etiology of innocent heart murmur with varying consensus, but everybody agrees that innocent heart murmur does not carry any morbidity or mortality risk. Even today, heart murmur is associated with high physician uncertainty and parental anxiety. Extensive cardiac evaluation for such a benign finding is also associated with high health care utilization and cost. This article attempts to review this long-known finding which continues to remain a diagnostic challenge.

Appropriateness of pediatric outpatient transthoracic echocardiogram orders following cessation of an active educational intervention

OBJECTIVE

The educational intervention (EI) through the Pediatric Appropriate Use of Echocardiography (PAUSE) multicenter study resulted in improved appropriateness of transthoracic echocardiogram (TTE) orders at our center. The current study evaluated if this pattern persisted after cessation of EI and the potential physician characteristics influencing appropriateness.

DESIGN

Outpatients (≤18 years old) seen for initial evaluation during the EI (July to October, 2015) and 6-month post-EI (May to August, 2016) phases were included. Comparison was made between TTE rates and appropriateness ratings during EI and post-EI phase. Association between TTE rate and appropriateness with physician characteristics (age, experience, patient volume, and area of practice) was determined using odds ratio.

RESULTS

The study included 7781 patients (EI: N = 4016; post-EI: N = 3765) seen by 31 physicians. Comparison of appropriateness ratings in a randomized sample (EI: N = 1270; post-EI: N = 1325 patients) showed no significant differences between the two phases (appropriate: 75.2% vs 74.9%, P = .960; rarely appropriate 4.1% vs 6.5%, P = .065). Though there was significant variability among physicians for TTE order appropriateness (P = .044) and ordering rate (P <.001), none of their characteristics were associated with appropriateness and only a higher patient volume was associated with decreased odds of TTE ordering (OR =0.7).

CONCLUSION

The PAUSE study EI resulted in maintaining appropriate utilization of TTEs at our center for 6 months following its cessation. Though not statistically significant, there was a trend toward increase in the proportion of studies for indications designated rarely appropriate (R). There was significant physician variability in TTE ordering and appropriateness during both phases. Development of EI to reduce physician variability and integration of EI with provider workflow may help sustain appropriate TTE utilization.

Usefulness of Echocardiography in Children with New-Onset Supraventricular Tachycardia

BACKGROUND

Supraventricular tachycardia (SVT) is the most common sustained arrhythmia in children. Infants with SVT and ventricular preexcitation (Wolff-Parkinson-White syndrome) are known to have up to 30% prevalence of congenital heart disease (CHD). Infants without ventricular preexcitation who present with SVT at <1 year of age have a similar prevalence of CHD. However, for children without ventricular preexcitation who present with SVT at older ages, the prevalence of CHD is not known. The aim of this study was to determine the prevalence of CHD in older children and adolescents presenting with SVT without ventricular preexcitation, with the goal of providing guidance regarding the usefulness of echocardiography in this patient population.

METHODS

Children aged 2 to 18 years presenting with confirmed SVT between January 2011 and December 2015 were included in this retrospective review. Patients with any history of ventricular preexcitation or preexisting heart disease were excluded. Medical records were reviewed, and electrocardiographic and echocardiographic findings were classified as normal, incidental, or abnormal.

RESULTS

Two hundred ninety patients met the inclusion criteria. Echocardiographic examinations were completed on 224 patients. Only one patient was found to have CHD, a moderate primum atrial septal defect. This patient was noted to have electrocardiographic abnormalities consistent with primum atrial septal defect.

CONCLUSIONS

For older children and adolescents with no known heart disease presenting with SVT without ventricular preexcitation, echocardiography may not be a necessary part of initial evaluation when the results of physical examination and electrocardiography are normal.

A qualitative assessment of pediatric cardiology core content: Comments from Kentucky trainees, pediatricians, and pediatric cardiologists

OBJECTIVE

The 2016 American Board of Pediatrics (ABP) content outline is comprehensive, including more than 50 cardiology-specific objectives within eight content areas. This study complements the quantitative analysis of a Kentucky-wide survey of trainees, pediatricians, and pediatric cardiologists asking them to identify "most important" cardiology content by analyzing their open-ended comments about "what should be added" and "why?" within these eight categories.

DESIGN, METHODS, OUTCOME MEASURES

This cross-sectional study used an original, online survey instrument based on the 2016 ABP cardiology-specific objectives. We began an initial analysis of the qualitative data using Pandit's version of Glaser and Strauss Grounded theory (constant comparison). However, upon finding an abundance of comments focused on Diagnosis, we proceeded with a secondary analysis that further categorized Diagnosis comments into three themes aligned with Bloom's taxonomy. Additional comments focused on Management and clustered into Emergent/Acute Care (Resuscitation); Short-term Care (Inpatient); and Longitudinal Care (Outpatient).

RESULTS

Of the 136 respondents, 23 (17%) were residents, 15 (11%) fellows, 85 (62%) pediatricians, and 13 (10%) pediatric cardiologists with 80% of attendings having faculty/gratis faculty status. The open-ended questions "what needs to be added" and "why" generated 93 comments; 60 of which focused on Diagnosis; further classified as Recognize (16), Differentiate (12), and Evaluate (32). Management comments were related to acuity and care setting, grouped as Emergent/Acute Care (Resuscitation) [10]; Short-term Care (Inpatient) [6]; and Longitudinal Care (Outpatient) [17].

CONCLUSIONS

The 93 comments analyzed for this article showed a distinct preference for all respondents, trainees, pediatricians, and cardiologists alike, to value the addition of diagnostic skills with emphasis in the "evaluate" skill set as important cardiology curricular content beyond that included in the 2016 ABP cardiology-specific objectives. Responses could be used to provide practical guidance for curriculum design and reform.

Appropriate Use Criteria for paediatric echocardiography in an outpatient practice: a validation study

BACKGROUND

Although transthoracic echocardiography is the dominant imaging modality in CHD, optimal utilisation is unclear. We assessed whether adherence to the paediatric Appropriate Use Criteria for outpatient transthoracic echocardiography could reduce inappropriate use without missing significant cardiac disease.

METHODS

Using the Appropriate Use Criteria, we determined the indication and appropriateness rating for each initial echocardiogram performed at our institution during calendar year 2014 (N=1383). Chart review documented ordering provider training, patient demographics, and study result, classified as normal, abnormal, or abnormal motivating treatment within a 2-year follow-up period. We tested whether provider training level or patient age correlated with echocardiographic findings or appropriateness rating.

RESULTS

We found that 83.9% of echocardiograms were normal and that 66.7% had an appropriate indication. Nearly all abnormal results and all results motivating treatment were in appropriate studies, giving an odds ratio of 2.73 for an abnormal result if an appropriate indication was present (95% confidence interval 1.92-3.89, p<0.001). None of the remaining initial abnormal results with less than appropriate indications became significant, resulting in treatment over 2 years. Results suggest a potential reduction in imaging volume of as much as 33% with application of the criteria. Cardiologists ordered nearly all studies resulting in treatment but also more echocardiograms with less appropriate indications. Most examinations were in older patients; however, most abnormal results were in patients younger than 1 year.

CONCLUSIONS

The Appropriate Use Criteria can be used to safely reduce echocardiography volume while still detecting significant heart disease.

[Heart murmur in children less than 2 years-old: looking for a safe and effective referral strategy]

INTRODUCTION

Current guidelines in Spain recommend performing transthoracic echocardiography (TTE) in all children under 2 years of age with a heart murmur. In 2014, the American Paediatric Association published the first appropriate use criteria (AUC) for outpatient paediatric transthoracic echocardiography (TTE) to promote its cost-efficient use. The aim of this article is to analyse the AUC and other clinical factors as predictors of congenital heart disease (CHD) in children less than 2 years of age with a heart murmur, and to develop a safe and efficient referral strategy.

PATIENTS AND METHOD

Case-control study conducted with children less than 2 years of age, referred from Paediatric Primary Care to Paediatric Cardiology during a 4-year study. A predictive model for CHD was determined using multivariate analysis.

RESULTS

A total of 688 patients were included, with 129 (19%) cases of CHD. An age less than 3 months (adjusted odds ratio [ORa] 3.8 [1.5-8.4], p=.030) and fulfilling AUC (ORa 16.3 [9.4-28.3], p<.001) were predictors of CHD. Concurrent infection (ORa 0.6 [0.2-0.8], p<.001) and a negative neonatal screening with pulse oximetry (ORa 0.1 [0.05-0.4], p=.001) decreased the risk of CHD. The referral strategy that included these criteria had a 98% sensitivity, 39% specificity, and positive and negative predictive values of 27% and 99%, respectively. It could not diagnose 2% of CHD (all mild), and showed a 32% TTE reduction rate compared to our current strategy.

CONCLUSION

To refer children less than 3 months old, fulfilling AUC, without a concurrent infection, or without negative neonatal pulse oximetry screening, is a safe and efficient strategy for the management of heart murmur in children under 2 years of age.

Yield of Echocardiogram and Predictors of Positive Yield in Pediatric Patients: A Study in an Urban, Community-Based Outpatient Pediatric Cardiology Clinic

The yield of outpatient echocardiograms varies based on the indication for the echocardiogram and the age of the patient. The purpose of this study was to determine the cumulative yield of outpatient echocardiograms by age group and reason for the test. A secondary aim was to determine the predictors of a positive echocardiogram in an outpatient cardiology clinic at a large community teaching hospital. We retrospectively reviewed the charts of 891 patients who had a first-time echocardiogram between 2011 and 2015. Positive yield was defined as echocardiographic findings that explained the reason for the echocardiogram. The overall positive yield was 8.2%. Children between birth and 3 months of age had the highest yield (34.2%), and children between 12 and 18 years of age had the lowest yield (1%). Patients with murmurs (18.1%) had the highest yield compared with patients with other signs or symptoms. By age group and reason, the highest yields were as follows: 0 to 3 months of age, murmur (39.2%); 4 to 11 months of age, >1 symptom (50%); and 1 to 5 years of age, shortness of breath (66.7%). Based on our study, the overall yield of echocardiograms in the outpatient pediatric setting is low. Age and symptoms should be considered before ordering an echocardiogram.

Two-Phase Contrast Injection Protocol for Pediatric Cardiac Computed Tomography in Children with Congenital Heart Disease

To assess a two-phase contrast injection protocol for contrast enhancement during cardiac computed tomography (CT) in children with congenital heart disease. Forty-three children (20 boys, 23 girls) of median age 13 months (range 3 days-8.3 years) and weighing ≤ 20 kg who underwent cardiac CT using a two-phase contrast injection protocol at our institution were retrospectively identified. High-pitch spiral third-generation dual-source cardiac CT (tube voltage 70 kV) was performed with a fixed delay of 60 s after contrast injection in the order of 10 mgI/kg/s (30 s), 15 mgI/kg/s (20 s), and a saline chaser (10 s). Attenuation in the inferior vena cava (IVC), superior vena cava (SVC), right atrium (RA), right ventricle (RV), pulmonary artery (PA), left atrium (LA), left ventricle (LV), and descending aorta (AO) was compared using the Steel-Dwass and Fisher's exact tests. The median (interquartile range) attenuation in the IVC, SVC, RA, RV, PA, LA, LV, and AO was 285 (264-347) Hounsfield units (HU), 416 (370-445) HU, 368 (320-388) HU, 373 (322-417) HU, 397 (330-432) HU, 425 (373-469) HU, 435 (385-468) HU, and 437 (392-491) HU, respectively (p < 0.05, IVC vs. the other anatomic sites). There was no significant difference in diagnostic success rate for attenuation > 250 HU between the IVC (41 children, 95.3%) and the other sites (43 children, 100%). A two-phase contrast injection protocol is useful for effective contrast enhancement in pediatric cardiac CT.

Assessment of tetralogy of Fallot-associated congenital extracardiac vascular anomalies in pediatric patients using low-dose dual-source computed tomography

Background

To investigate the diagnostic value of dual-source computed tomography (DSCT) in the evaluation of tetralogy of Fallot (TOF)-associated extracardiac vascular abnormalities in pediatric patients compared with transthoracic echocardiography (TTE).

Methods

One hundred and twenty-three pediatric patients diagnosed with TOF were included in this retrospective study. All patients underwent DSCT and TTE preoperatively. All associated extracardiac vascular abnormalities and their percentages were recorded. The diagnostic performances of DSCT and TTE were compared based on the surgical results. The image quality of DSCT was rated, and the effective radiation dose (ED) was calculated.

Results

A total of 159 associated extracardiac vascular deformities were confirmed by surgery. Patent ductus arteriosus (36, 22.64%), right-sided aortic arch (29, 18.24%), and pulmonary valve stenosis (23, 14.47%) were the most common associated extracardiac vascular abnormalities. DSCT was superior to TTE in demonstrating associated extracardiac anomalies (diagnostic accuracy: 99.13% vs. 97.39%; sensitivity: 92.45% vs. 77.07%; specificity: 99.81% vs. 99.42%). The agreement on grading the image quality of DSCT was excellent (κ = 0.80), and the mean score of the image quality was 3.39 ± 0.50. The mean ED of DSCT was 0.86 ± 0.47 mSv.

Conclusions

Compared to TTE, low-dose DSCT has high diagnostic accuracy in the depiction of associated extracardiac vascular anomalies in pediatric patients with TOF, and could provide more morphological details for surgeons.

The Use of Echocardiography for Pediatric Patients Presenting with Syncope

OBJECTIVES

To assess the frequency, yield, and cost of echocardiograms meeting "rarely appropriate" criteria.

STUDY DESIGN

Retrospective, single-center study of pediatric patients presenting with syncope. Patients were categorized according to the appropriate use criteria and based upon location of care (emergency department only, primary care setting only, or referred to a pediatric cardiologist). Multivariable regression was used to determine factors associated with performance of a "rarely appropriate" echocardiogram. Costs were calculated using fair market values from the Healthcare Bluebook.

RESULTS

The cohort included 637 patients presenting with syncope during the 1-year study. Echocardiograms were ordered for 127 of 637 (20.1%) including 0 of 328 emergency department patients, 1 of 66 (1.5%) primary care setting patients, and 127 of 243 (52.3%) patients evaluated by a pediatric cardiologist. Use of echocardiography by pediatric cardiologists was categorized as "appropriate" in 92 of 127 (72.4%), "maybe appropriate" in 6 of 127 (4.7%), and "rarely appropriate" in 29 of 127 (22.8%). Abnormal findings were seen in 6 of 127 (4.7%) echocardiograms but in none of the "rarely appropriate" studies. In multivariable analysis, female sex and younger age were the only factors associated with performance of a "rarely appropriate" echocardiogram. "Rarely appropriate" echocardiograms cost an estimated $16 704.00 ($576.00 per patient) in the 1-year study.

CONCLUSIONS

"Rarely appropriate" echocardiograms performed for syncope do not contribute management changing diagnostic information. However, they burden patients with additional cost and perhaps contribute to increased need for follow-up.