Obesity increases the risk for various cardiovascular problems. Increase in body mass index is often an independent risk factor for the development of elevated blood pressure and clustering of various cardiovascular risk factors.

To determine early markers of left ventricular affection in obese patients before the appearance of left ventricular hypertrophy.

In this cross-sectional study, we evaluated 42 obese patients and 30 healthy controls. Their ages ranged from 6 to 19 years. Studied children were subjected to anthropometric, lipid profile, and serum Troponin I level measurements. Echocardiographic evaluation performed to assess the left ventricle included left ventricular dimension measurement using motion-mode echocardiography, based on which patients with left ventricular hypertrophy (10 patients) were eliminated, as well as conventional and tissue Doppler imaging.

Tissue Doppler findings in the study groups showed that the ratio of transmitral early diastolic filling velocity to septal peak early diastolic myocardial velocity (E/e′) was significantly higher in cases compared with controls [6.9±1.4 versus 9.0±1.6, p (Pearson’s coefficient)=0.001, respectively]. The level of cardiac troponin I was significantly higher in cases compared with controls [0.14±0.39 ng/ml versus 0.01±0.01 ng/ml, p (Pearson’s coefficient)=0.047, respectively] and there was a significant correlation between troponin I and transmitral early diastolic filling velocity to septal peak early diastolic myocardial velocity ratio (E/e′) [R (correlation coefficient)=0.6].

Tissue Doppler Imaging and Troponin I evaluation proved useful tools to detect early affection of the left ventricle in obese patients even in the absence of left ventricular hypertrophy.

The relationship between sildenafil dosing, exposure, and systemic hypotension in infants is incompletely understood.

The aim of this study was to characterise the relationship between predicted sildenafil exposure and hypotension in hospitalised infants.

We extracted information on sildenafil dosing and clinical characteristics from electronic health records of 348 neonatal ICUs from 1997 to 2013, and we predicted drug exposure using a population pharmacokinetic model.

We identified 232 infants receiving sildenafil at a median dose of 3.2 mg/kg/day (2.0, 6.0). The median steady-state area under the concentration–time curve over 24 hours (AUC24,SS) and maximum concentration of sildenafil (Cmax,SS,SIL) were 712 ng×hour/ml (401, 1561) and 129 ng/ml (69, 293), respectively. Systemic hypotension occurred in 9% of the cohort. In multivariable analysis, neither dosing nor exposure were associated with systemic hypotension: odds ratio=0.96 (95% confidence interval: 0.81, 1.14) for sildenafil dose; 0.87 (0.59, 1.28) for AUC24,SS; 1.19 (0.78, 1.82) for Cmax,SS,SIL.

We found no association between sildenafil dosing or exposure with systemic hypotension. Continued assessment of sildenafil’s safety profile in infants is warranted.

Although the right jugular vein approach for percutaneous pulmonary valve implantation is well described, there are no reports that describe a percutaneous pulmonary valve implantation through a left superior caval vein to coronary sinus pathway.

A 14-year-old female with tetralogy of Fallot, mesocardia, left superior caval vein draining into the coronary sinus, and hemiazygos continuation of the inferior caval vein underwent ventricular septal defect closure, with homograft insertion from the right ventricle to the pulmonary artery, patch augmentation of the left pulmonary artery, and creation of an atrial communication. Thereafter followed numerous catheterisations and interventions with stent implantation for stenosis of the left pulmonary artery and the homograft, as did device closure of the atrial communication. When she was a 12-year-old, the indications for a percutaneous pulmonary valve implantation were fulfilled and she underwent implantation of a 22 mm Melody® valve through the left superior caval vein. The extra-stiff exchange wire was pre-formed into a “U-spiral”-type configuration, according to the underlying anatomy, in order to provide a smooth route for the delivery of stents, to create the landing zone, and for the implantation of the Melody “ensemble”. The procedure was performed under deep sedation according to our standard protocol. The duration of the procedure was 172 min and the radiation time was 24.9 min.

On the basis of this unique experience, percutaneous pulmonary valve implantation is safe and feasible even in patients with unusual anatomy. Crucial is the “U-spiral” shaped configuration of the guide wire.

Transcatheter right ventricle decompression in neonates with pulmonary atresia and intact ventricular septum is technically challenging, with risk of cardiac perforation and death. Further, despite successful right ventricle decompression, re-intervention on the pulmonary valve is common. The association between technical factors during right ventricle decompression and the risks of complications and re-intervention are not well described.

This is a multicentre retrospective study among the participating centres of the Congenital Catheterization Research Collaborative. Between 2005 and 2015, all neonates with pulmonary atresia and intact ventricular septum and attempted transcatheter right ventricle decompression were included. Technical factors evaluated included the use and characteristics of radiofrequency energy, maximal balloon-to-pulmonary valve annulus ratio, infundibular diameter, and right ventricle systolic pressure pre- and post-valvuloplasty (BPV). The primary end point was cardiac perforation or death; the secondary end point was re-intervention.

A total of 99 neonates underwent transcatheter right ventricle decompression at a median of 3 days (IQR 2–5) of age, including 63 patients by radiofrequency and 32 by wire perforation of the pulmonary valve. There were 32 complications including 10 (10.5%) cardiac perforations, of which two resulted in death. Cardiac perforation was associated with the use of radiofrequency (p=0.047), longer radiofrequency duration (3.5 versus 2.0 seconds, p=0.02), and higher maximal radiofrequency energy (7.5 versus 5.0 J, p<0.01) but not with patient weight (p=0.09), pulmonary valve diameter (p=0.23), or infundibular diameter (p=0.57). Re-intervention was performed in 36 patients and was associated with higher post-intervention right ventricle pressure (median 60 versus 50 mmHg, p=0.041) and residual valve gradient (median 15 versus 10 mmHg, p=0.046), but not with balloon-to-pulmonary valve annulus ratio, atmospheric pressure used during BPV, or the presence of a residual balloon waist during BPV. Re-intervention was not associated with any right ventricle anatomic characteristics, including pulmonary valve diameter.

Technical factors surrounding transcatheter right ventricle decompression in pulmonary atresia and intact ventricular septum influence the risk of procedural complications but not the risk of future re-intervention. Cardiac perforation is associated with the use of radiofrequency energy, as well as radiofrequency application characteristics. Re-intervention after right ventricle decompression for pulmonary atresia and intact ventricular septum is common and relates to haemodynamic measures surrounding initial BPV.

Neurodevelopmental abnormalities are common in children with CHD and are the highest-priority concerns for parents and professionals following cardiac surgery in childhood. There is no additional routine monitoring of development for children with CHD in the United Kingdom; hence, neurodevelopmental concerns may be detected late, precluding early referral and intervention.

An early recognition tool – the “Brief Developmental Assessment” – was developed using quality improvement methodology involving several iterations and rounds of pilot testing. Our requirements were for a tool covering important developmental domains and practicable for use within inpatient and outpatient settings by paediatric cardiac health professionals who are non-developmental specialists, without specialised equipment and which involved direct observation, as well as parental report.

Items were included in the tool based on existing developmental measures, covering the domains of gross and fine motor skills, daily living skills, communication, socialisation, and general understanding. Items were developed for five age bands – 0–16 weeks, 17–34 weeks, 35–60 weeks, 15 months–2.9 years, and 3–4.9 years – and the final versions included a traffic light scoring system for identifying children with possible delay in any or all domains. Preliminary testing indicated excellent inter-rater reliability, an ability to detect children with a diagnosis known to be associated with developmental delay, and largely acceptable internal reliability.

We report the evolution and preliminary testing of an early recognition tool for assessing the development of children with heart disease; this was encouraging and sufficiently good to support further validation in a larger study.

Abstract presentations of scientific information at meetings are important for broadcasting new information. Publication of these studies should be the final goal, but minimal data exist documenting publication rates, especially for paediatric sub-speciality meetings. The goal of this study was to document the manuscript publication rate for paediatric cardiac echocardiography abstracts and to determine whether there were differences between abstracts that were published versus not published.

Paediatric cardiac echocardiography abstracts presented from 2007 to 2011 at the American Society of Echocardiography Meetings were reviewed. Characteristics of the abstracts were noted. A Medline/Pubmed search was performed using keywords, first author, and senior author criteria to determine publication. Fisher’s exact tests or χ2 tests were used for analysis.

A total of 194 abstracts were reviewed. In all, 27 abstracts were oral presentations and 167 were poster presentations. A total of 124 abstracts were prospective studies and 70 were retrospective studies; 11 abstracts were basic science studies and 183 were clinical studies. Altogether, 25 abstracts dealt with three-dimensional echocardiography, 15 with fetal echocardiography, 56 with deformation analysis, 79 with standard transthoracic echocardiography, and 19 were in the other category. A total of 73 abstracts were subsequently published – with a 37.6% publication rate – 2.1±1.7 years after initial presentation. There were no significant differences in publication rates based on the above-noted variables.

A paediatric cardiac echocardiography abstract publication rate of 37.6% is comparable to previous published publication rates for other meetings. No differences in variables analysed were noted between published versus unpublished abstracts.

The description of pressure injury development is limited in children with CHD. Children who develop pressure injuries experience pain and suffering and are at risk for additional morbidity.

The objective of this study was to develop a standardized clinical assessment and management plan to describe the development of pressure injury in paediatric cardiac surgical patients and evaluate prevention strategies.

Using a novel quality improvement initiative, postoperative paediatric cardiac surgical patients were started on a nurse-driven pressure injury prevention standardized clinical assessment and management plan on admission. Data were recorded relevant to nursing assessments and management based on pre-defined targeted data statements and algorithm. Nursing feedback regarding diversions was recorded and analysed.

Data on 674 congenital paediatric cardiac surgical patients who met criteria were collected between May, 2011 and June, 2012. In 5918 patient days, a total of 4603 skin assessments were completed by nurses from the cardiac ICU and the cardiac inpatient unit, representing 77% of the expected assessments. The majority (70%, 21/30) of the 30 pressure injuries were medical-device-related and 30% (9/30) were immobility-related. The overall incidence of pressure injury was 4.4%: device-related was 3.1% and immobility-related was 1.3%. Most pressure injuries were Stage 1 (40%), followed by Stage 2 (26.7%), mucosal membrane injury (26.7%), and suspected deep tissue injuries (6.7%).

A nurse-driven pressure injury prevention standardized clinical assessment and management plan supported a programme-based evaluation of nursing practice and patient outcomes. Review of practices highlighted opportunities to standardise and focus prevention practices and ensure communication of patient vulnerabilities.

Risk for neurodevelopmental delay in infants and children with CHD is well established, but longer-term outcomes are equivocal. A meta-analysis was conducted to establish whether cognitive deficits remain beyond childhood – into teenage and young adult years.

A total of 18 unique samples, involving adolescents, teenagers, and adults with CHD significant enough to require invasive intervention, and sourced through searches of Web of Science, MEDLINE, CINAHL Plus, and PsychInfo, met the inclusion criteria. These included the use of standardised neuropsychology tests across 10 domains of cognitive functioning and the reporting of effect size differences with controls. Reports of patients with chromosomal or genetic abnormalities were excluded. Pooled effect sizes suggested no significant differences between CHD samples and controls in terms of general intellectual ability and verbal reasoning. However, small–medium effects sizes were noted (0.33–0.44) and were statistically significant within the domains of non-verbal reasoning, processing speed, attention, auditory–verbal memory, psychomotor abilities, numeracy, and literacy with executive functioning also emerging as significant when one study outlier was excluded. We also included quality assurance statistics including Cochran’s Q, T, and I2 statistics, leave-one-out analyses, and assessment of publication bias. These often suggested study variability, possibly related to the heterogeneity of diagnostic groups included, and different tests used to measure the same construct.

Heterogeneity indicated that moderators affect cognitive outcomes in CHD. Nevertheless, deficits across cognitive domains were discerned, which are likely to have functional impact and which should inform practice with this clinical population.

There is no standard dose or protocol for beta-blocker administration as preconditioning in children undergoing coronary CT angiography.

A total of 63 consecutive patients, with a mean age of 10.0±3.1 years, who underwent coronary CT angiography to assess possible coronary complications were enrolled in a single-centre, retrospective study. All patients were given an oral beta-blocker 1 hour before coronary CT angiography. Additional oral beta-blocker or intravenous beta-blocker was given to those with a high heart rate. We compared image quality, radiation exposure, and adverse events among the patients without additional beta-blocker, with additional oral beta-blocker, and with additional intravenous beta-blocker.

There were no significant differences in image quality or radiation exposure among the groups. The heart rate just before scanning was significantly correlated with image quality (p<0.001, r=−0.533) but was not correlated with radiation exposure (p=0.45, r=0.096). There were no adverse events related to any allergic reaction, thereby showing the effectiveness of the beta-blocker.

Initial oral beta-blocker administration (0.8 mg/kg/dose) should be administered to all children undergoing coronary CT angiography. Additional intravenous beta-blocker should be given to those with poor heart rate control to improve image quality without increasing radiation exposure or allowing adverse events.

We aimed to investigate the incidence and causes of readmission of infants with single-ventricle and shunt-dependent biventricular CHD following routine, outpatient cardiac catheterisation.

Cardiac catheterisation is commonly performed in patients with single-ventricle and shunt-dependent biventricular CHD for haemodynamic assessment and surgical planning. Best practices for post-procedural care in this population are unknown, and substantial variation exists between centres. Outpatient catheterisation reduces parental anxiety and decreases cost. Our institutional strategy is to discharge patients following a 4- to 6-hour post-procedure observation period.

Retrospective cohort study using the Society of Thoracic Surgeons Database identified patients <1 year of age with pre-stage II single-ventricle CHD or shunt-dependent biventricular CHD who underwent cardiac catheterisation between 2007 and 2015. Readmission was defined as admission to the hospital within 48 hours after discharge after catheterisation.

A total of 92 patients were included in the analysis. Among them, 62 patients (67%) were discharged after a 4- to 6-hour observation period with only 3% readmission, 18 patients (20%) stayed for a 23-hour observation period, and 12 patients (13%) were admitted for >23 hours. There were no differences in baseline characteristics between discharged and admitted patients. Patients who underwent intervention were more likely to be admitted. Patients with hypoplastic left heart syndrome did not have major adverse events or readmissions. No intra- or peri-procedural deaths occurred.

Outpatient cardiac catheterisation may be a safe option for infants with single-ventricle and shunt-dependent biventricular CHD, with low readmission rates and minimal morbidity.

Paediatric hospital-associated venous thromboembolism is a leading quality and safety concern at children’s hospitals.

The aim of this study was to determine risk factors for hospital-associated venous thromboembolism in critically ill children following cardiothoracic surgery or therapeutic cardiac catheterisation.

We conducted a retrospective, case–control study of children admitted to the cardiovascular intensive care unit at Johns Hopkins All Children’s Hospital (St. Petersburg, Florida, United States of America) from 2006 to 2013. Hospital-associated venous thromboembolism cases were identified based on ICD-9 discharge codes and validated using radiological record review. We randomly selected two contemporaneous cardiovascular intensive care unit controls without hospital-associated venous thromboembolism for each hospital-associated venous thromboembolism case, and limited the study population to patients who had undergone cardiothoracic surgery or therapeutic cardiac catheterisation. Odds ratios and 95% confidence intervals for associations between putative risk factors and hospital-associated venous thromboembolism were determined using univariate and multivariate logistic regression.

Among 2718 admissions to the cardiovascular intensive care unit during the study period, 65 met the criteria for hospital-associated venous thromboembolism (occurrence rate, 2%). Restriction to cases and controls having undergone the procedures of interest yielded a final study population of 57 hospital-associated venous thromboembolism cases and 76 controls. In a multiple logistic regression model, major infection (odds ratio=5.77, 95% confidence interval=1.06–31.4), age ⩽1 year (odds ratio=6.75, 95% confidence interval=1.13–160), and central venous catheterisation (odds ratio=7.36, 95% confidence interval=1.13–47.8) were found to be statistically significant independent risk factors for hospital-associated venous thromboembolism in these children. Patients with all three factors had a markedly increased post-test probability of having hospital-associated venous thromboembolism.

Major infection, infancy, and central venous catheterisation are independent risk factors for hospital-associated venous thromboembolism in critically ill children following cardiothoracic surgery or cardiac catheter-based intervention, which, in combination, define a high-risk group for hospital-associated venous thromboembolism.

The objectives of this study were to evaluate the plasma levels of asymmetric dimethyl-L-arginine in children with pulmonary hypertension due to CHD before and after treatment with sildenafil and to evaluate its diagnostic and prognostic value as a biomarker in such children.

A total of 60 children with CHD and 30 healthy control children matched for age and sex were recruited. Children with CHD were divided into two equal groups: the normal pulmonary pressure group (n=30) and the pulmonary hypertension group (n=30). Children with pulmonary hypertension were treated with sildenafil and were followed up for 6 months. Clinical data, haemodynamic parameters, echocardiographic examination, and asymmetric dimethyl-L-arginine levels were evaluated before and after treatment.

Asymmetric dimethyl-L-arginine levels were significantly higher in patients with pulmonary hypertension than in those with CHD-only or the control group, and this increase was positively correlated with increased severity of pulmonary hypertension. Asymmetric dimethyl-L-arginine levels, mean pulmonary artery pressure, and pulmonary vascular resistance were significantly decreased after treatment with sildenafil. Moreover, asymmetric dimethyl-L-arginine level was significantly lower in patients who responded to sildenafil treatment compared with those who did not. At a cut-off point of more than 0.85 nmol/ml, asymmetric dimethyl-L-arginine has a sensitivity of 83% and a specificity of 80% to diagnose pulmonary hypertension-CHD. Asymmetric dimethyl-L-arginine has a sensitivity of 100% and a specificity of 94% to predict poor prognosis in pulmonary hypertension-CHD children at a cut-off point of 1.3 nmol/ml.

Asymmetric dimethyl-L-arginine level has a good diagnostic and prognostic value as a biomarker in children with pulmonary hypertension-CHD and can be used for following up patients with pulmonary hypertension and predicting response to treatment.

Norwood palliation for patients with single ventricle heart disease is associated with a significant risk for acute kidney injury, which portends a worse prognosis. We sought to investigate the impact of hybrid stage I palliation (Hybrid) on acute kidney injury risk.

This study is a single-centre prospective case–control study of seven consecutive neonates with single ventricle undergoing Hybrid palliation. Levels of serum creatinine and four novel urinary biomarkers, namely neutrophil gelatinase-associated lipocalin, interleukin-18, liver fatty acid-binding protein, and kidney injury molecule-1, were obtained before and after palliation. Acute kidney injury was defined as a ⩾50% increase in serum creatinine within 48 hours after the procedure. Data were compared with a contemporary cohort of 12 neonates with single ventricle who underwent Norwood palliation.

Patients who underwent Hybrid were more likely to be high-risk candidates (86 versus 25%, p=0.01) compared with those who underwent Norwood. Despite similar preoperative serum creatinine levels, there was a trend towards higher levels of postoperative peak serum creatinine (0.7 [0.63, 0.94] versus 0.56 [0.47, 0.74], p=0.06) and rate of acute kidney injury (67 versus 29%, p=0.17) in the Norwood cohort. Preoperative neutrophil gelatinase-associated lipocalin (58.4 [11, 86.3] versus 6.3 [5, 16.2], p=0.07) and interleukin-18 (30.6 [9.6, 167.2] versus 6.3 [6.3, 16.4], p=0.03) levels were higher in the Hybrid cohort. Nevertheless, longitudinal mixed-effect models demonstrated Hybrid palliation to be a protective factor against increased postoperative levels of neutrophil gelatinase-associated lipocalin (estimate −1.8 [−3.0, −9.0], p<0.001) and liver fatty acid-binding protein (−49.3 [−89.7, −8.8], p=0.018).

In this single-centre case–control study, postoperative acute kidney injury risk did not differ significantly by single ventricle stage I treatment strategy; however, postoperative elevation in novel urinary biomarkers, consistent with subclinical kidney injury, was encountered in the Norwood cohort but not in the Hybrid cohort.