Echocardiographic Screening of Rheumatic Heart Disease: Current Concepts and Challenges.

The incidence of acute rheumatic fever (ARF), which most commonly affects children aged 5-15 years after group A Streptococcus (GAS) infection, ranges from 8 to 51 per 100 000 people worldwide. Rheumatic heart disease (RHD), which occurs when patients with ARF are inappropriately treated or not given regular prophylaxis, is the most common cause of non-congenital heart disease in children and young adults in low-income countries. Timely treatment of GAS infection can prevent ARF, and penicillin prophylaxis can prevent recurrence of ARF. Secondary prophylaxis with benzathine penicillin G has been shown to decrease the incidence of RHD and is a key aspect of RHD control. The most important factor determining the prognosis of RHD is the severity of cardiac involvement. Although approximately 70% of patients with carditis in the acute phase of the disease recover without sequelae, carditis is important because it is the only complication of ARF that causes sequelae. One-third of patients with ARF are asymptomatic. Patients with mild symptoms of recurrent ARF and silent RHD will develop severe morbidities within 5-10 years if they do not receive secondary preventive treatments. A new screening program should be established to prevent cardiac morbidities of ARF in moderate- and highrisk populations. In the present study, we examined the applicability of echocardiographic screening programs for RHD. Cite this article as: Topçu S, Uçar T. Echocardiographic screening of rheumatic heart disease: Current concepts and challenges. Turk Arch Pediatr. 2024;59(1):3-12.

Effect of Antenatal Magnesium Sulfate Exposure on Patent Ductus Arteriosus in Premature Infants.

OBJECTIVE: Magnesium sulfate (MgSO4) provides effective fetal neuroprotection. However, there is conflicting evidence regarding the association between antenatal MgSO4 exposure and patent ductus arteriosus (PDA). Thus, herein, we aimed to evaluate the association between antenatal MgSO4 exposure and PDA. STUDY DESIGN: Preterm infants born between 240/7 and 316/7 weeks of gestation were included in this retrospective study. Infants who died within the first 72 hours of life and those with significant congenital anomalies were excluded from the study. Echocardiographic and clinical assessment parameters were used to define PDA and hemodynamically significant PDA (hsPDA). Treatments were planned according to the standard protocols of the unit. The following data were collected from hospital medical records: perinatal characteristics, neonatal outcomes, detailed PDA follow-up findings, and maternal characteristics including MgSO4 exposure and doses. RESULTS: Of the 300 included infants, 98 (32.6%) were exposed to antenatal MgSO4. hsPDA rates were similar in the infants exposed and not exposed to antenatal MgSO4, when adjusted for antenatal steroid administration, gestational age, and birth weight (OR: 1.6, 95% CI: 0.849-3.118, p = 0.146). The rates of PDA ligation and open PDA at discharge were similar between the groups. A cumulative MgSO4 dose of >20 g was associated with an increased risk of hsPDA (crude OR: 2.476, 95% CI: 0.893-6.864, p = 0.076; adjusted OR: 3.829, 95% CI: 1.068-13.728, p = 0.039). However, the cumulative dose had no effect on the rates of PDA ligation or open PDA at discharge. Rates of prematurity-related morbidities and mortality were similar between the groups. CONCLUSION: Although antenatal MgSO4 exposure may increase the incidence of hsPDA, it may not affect the rates of PDA ligation or open PDA at discharge. Further studies are required to better evaluate the dose-dependent outcomes and identify the MgSO4 dose that not only provides neuroprotection but also has the lowest risk of adverse effects. KEY POINTS: · Antenatal exposure of MgSO4 may cause PDA.. · Antenatal MgSO4 exposure may not increase the rates of PDA ligation or open PDA at discharge.. · Further studies are required to better evaluate the dose-dependent outcomes and optimal MgSO4 dose..

Cardiovascular manifestations and cardiac magnetic resonance follow-up of multisystem inflammatory syndrome in children (MIS-C).

OBJECTIVE: This study aimed to evaluate the cardiovascular manifestations and surveillance of multisystem inflammatory syndrome in children (MIS-C) and to determine the correlation of echocardiographic findings with cardiac magnetic resonance imaging findings. METHODS: Forty-four children diagnosed as MIS-C with cardiac involvement were enrolled in this observational descriptive study. The diagnosis of MIS-C was made according to the criteria of Centers for Disease Control and Prevention. Clinical findings, laboratory parameters, and electrocardiographic and echocardiographic findings at the time of diagnosis and during follow-up were evaluated. Cardiac magnetic resonance was performed on 28 (64%) cases. The 1-year follow-up imaging was performed in all cases with abnormal initial cardiac magnetic resonance findings. RESULTS: Forty-four patients (56.8% male) with a mean age of 8.5 ± 4.8 years were enrolled in this study. There was a significant positive correlation between high-sensitivity cardiac troponin T (mean: 162 ± 444.4 pg/ml) and N-terminal pro b-type natriuretic peptide (mean: 10,054 ± 11,604 pg/ml) (p < 0.01). Number of cases with an electrocardiographic and echocardiographic abnormality was 34 (77%) and 31 (70%), respectively. Twelve cases (45%) had left ventricular systolic dysfunction and 14 (32%) cases had pericardial effusion on admission. Three cases (11%) had cardiac magnetic resonance findings that may be attributed to the presence of myocardial inflammation, and pericardial effusion was present in seven (25%) cases. Follow-up cardiac magnetic resonances of all cases were normal. Cardiac abnormalities were completely resolved in all except two cases. CONCLUSIONS: Myocardial involvement can be seen during acute disease, but MIS-C generally does not lead to prominent damage during a year of surveillance. Cardiac magnetic resonance is a valuable tool to evaluate the degree of myocardial involvement in cases with MIS-C.

The impact of fragmented QRS on clinical findings and outcomes in children with dilated cardiomyopathy with or without left ventricular non-compaction.

OBJECTIVE: The aim of this study is to investigate the frequency of fragmented QRS and its associations with clinical findings and prognosis in children diagnosed with dilated cardiomyopathy with or without left ventricular non-compaction. METHODS: This retrospective study was conducted between 2010 and 2020. Patients with dilated cardiomyopathy were classified into two groups according to the presence of left ventricular non-compaction: Dilated cardiomyopathy with left ventricular non-compaction and dilated cardiomyopathy without left ventricular non-compaction. Patients were also divided into two groups according to the presence of fragmented QRS (fragmented QRS group and non-fragmented QRS group). RESULTS: Twenty-three of 44 patients (52.3%) were male. Among left ventricular non-compaction patients, the fragmented QRS group had more complex ventricular arrhythmias (p = 0.003). Patients with fragmented QRS had a significantly higher rate of major adverse cardiac events and/or cardiac death in both cardiomyopathy groups (p = 0.003 and p = 0.005). However, the rate of major adverse cardiac events and/or cardiac death was similar between dilated cardiomyopathy patients with and without left ventricular non-compaction. Multivariate logistic regression analysis showed that the presence of fragmented QRS strongly predicts major adverse cardiac events and/or cardiac death (odds ratio, 31.186; 95% confidence interval, 2.347-414.307). Although the survival rates between cardiomyopathy groups were similar, patients with fragmented QRS had a markedly lower survival rate during the follow-up period, as mean of 15 months (p = 0.001). CONCLUSION: Our study showed that the presence of fragmented QRS may be an important ECG sign predicting an major adverse cardiac event and/or cardiac death in patients with dilated cardiomyopathy. We believe that recognising fragmented QRS could be valuable in forecasting patient prognosis and identifying high-risk patients who require additional support.

Venovenous Versus Venoarterial Extracorporeal Membrane Oxygenation: Pediatric Acute Respiratory Distress Syndrome.

OBJECTIVE: This study aimed to compare the efficacy, complication, and mortality of patients who were supported by venovenous (VV) extracorporeal membrane oxygenation (ECMO) and venoarterial (VA) ECMO for pediatric acute respiratory distress syndrome (PARDS). MATERIALS AND METHODS: This study is a single-center, retrospective cohort study between 2014 and 2022. We evaluated to indication of ECMO support, ECMO type, patients' demographic features, complications, and children's outcomes supported by ECMO for PARDS. RESULTS: Twenty-two patients with PARDS, 12 (54%) with VV, and 10 (46%) with VA ECMO were selected. The median number of days to be intubated before ECMO cannulation was 5 (0-16) days. The distribution of intubated days before the patients underwent ECMO was as follows: 0-1 days, 7 (31.8%) patients; 2-3 days, 2 (9.1%) patients; 4-7 days, 7 (31.8%) patients; 8-14 days, 5 (22.8%) patients; >14 days, 1 (4.5%) patient. The median ECMO cannulation day after admission to the pediatric intensive care unit was 3 (range, 1-9) days in the VV ECMO patient group, whereas it was 8 (range, 0-19) days in the VA ECMO group (P = .02). Considering hospital survival, 4 (45%) patients who underwent double-lumen VV ECMO, 1 (33%) patient who underwent VV ECMO, and 3 (30%) patients who supported by VAECMO survived. There was no difference between the groups in terms of hospital discharge rates. CONCLUSION: The highest survival rate was found in the VV ECMO patient group established with double-lumen cannulas, similar to the literature. There was no difference in mortality between the groups whose intubation time before ECMO was 14 days or less.

Complications of epicutaneo-caval catheters: Pericardial effusion and cardiac tamponade in three preterm infants.

In the neonatal intensive care units (NICU), epicutaneo-caval catheters (ECCs) are common alternative vascular routes. Pericardial effusion (PCE) and cardiac tamponade (CT) are rare but serious complications in infants with ECCs. It may be asymptomatic or present with a variety of significant clinical signs, including dyspnea, bradycardia, sudden asystole, and hypotension. If untreated, PCE can be fatal. This report presents, three cases of ECC-associated PCE/CT during NICU stay. All three patients were born before 30 weeks of gestation and weighed less than 1500 g. Echocardiography was used for diagnosis all patients. PCE/CT was detected incidentally in one patient and after hemodynamic deterioration in the other two. In one patient, CT was developed due to catheter malposition, and the other two patient, the catheter tip was found in the right atrium. PCE did not recur in any of the patients after pericardial fluid was drained and the catheters were removed. No PCE/CT-related deaths were observed. In all three patients, X-ray was used to evaluate the location of the catheter tips. However, after clinical deterioration, echocardiography showed that in the first two cases the tips were actually in the right atrium. Real-time ultrasound was suggested with strong evidence to evaluate the location of the catheter tip and to detect secondary malapposition. PCE/CT should be considered in the presence of unexplained and refractory respiratory distress, abnormal heart rate and blood pressure, and metabolic acidosis in a neonate with ECC. Early diagnosis and prompt pericardiocentesis are essential to reduce mortality and improve prognosis. Prospective studies with educational interventions should be designed to demonstrate that the use of point-of-care ultrasound (POCUS) can be easily acquired and may reduce complications.

Prolonged extracorporeal membrane oxygenation in pediatrics: How long did we wait?

BACKGROUND: In this study, we aimed to evaluate the duration of extracorporeal membrane oxygenation (ECMO) and its effect on outcomes. Also, we sought to identify hospital mortality predictors and determine when ECMO support began to be ineffective. METHODS: This was a single-center, retrospective cohort study conducted between January 2014 and January 2022. The prolonged ECMO (pECMO) cut-off point was accepted as 14 days. RESULTS: Thirty-one (29.2%) of 106 patients followed up with ECMO had pECMO. The mean follow-up period of the patients who underwent pECMO was 22 (range, 15-72) days, and the mean age was 75 ± 72 months. According to the results of our heterogeneous study population, life expectancy decreased dramatically towards the 21st day. Hospital mortality predictors were determined in the logistic regression analysis in all ECMO groups in our study as high Pediatric Logistic Organ Dysfunction (PELOD) two score, continuous renal replacement therapy (CRRT) use, and sepsis. The pECMO mortality was 61.2% and the overall mortality was 53.0%, with the highest mortality rate in the bridge-to-transplant group (90.9%) because of lack of organ donation in our country. CONCLUSIONS: In our study, the PELOD two score, presence of sepsis, and use of CRRT were found to be in the predictors of in-hospital ECMO mortality model. Considering the complications, in the COX regression model analysis, the factors affecting the probability of dying in patients followed under ECMO were found to be bleeding, thrombosis, and thrombocytopenia.

Hybrid extracorporeal membrane oxynegation in pediatric intensive care patients: A single center experience: More is better?

BACKGROUND: The initial extracorporeal membrane oxygenation (ECMO) configuration is inefficient for patient oxygenation and flow, but by adding a Y-connector, a third or fourth cannula can be used to support the system, which is called hybrid ECMO. METHODS: This was a single-center retrospective study consisting of patients receiving hybrid and standard ECMO in our PICU between January 2014 and January 2022. RESULTS: The median age of the 12 patients who received hybrid ECMO and were followed up with hybrid ECMO was 140 (range, 82-213) months. The total median ECMO duration of the patients who received hybrid ECMO was 23 (8-72) days, and the median follow-up time on hybrid ECMO was 18 (range, 3-46) days. The mean duration of follow-up in the PICU was 34 (range, 14-184) days. PICU length of stay was found to be statistically significant and was found to be longer in the hybrid ECMO group (p = 0.01). Eight (67%) patients died during follow-up with ECMO. Twenty-eight-day mortality was found to be statistically significant and was found to be higher in the standard ECMO group (p = 0.03). The hybrid ECMO mortality rate was 66% (decannulation from ECMO). The hybrid ECMO hospital mortality rate was 75%. The standard ECMO mortality rate was 52% (decannulation from ECMO). The standard ECMO hospital mortality rate was 65%. CONCLUSIONS: Even though hybrid ECMO use is rare, with increasing experience and new methods, more successful experience will be gained. Switching to hybrid ECMO from standard ECMO at the right time with the right technique can increase treatment success and survival.

Multisystem Inflammatory Syndrome in Children Admitted to a Tertiary Pediatric Intensive Care Unit.

Background Multisystem inflammatory syndrome in children (MIS-C) is characterized by persistent fever, abdominal pain, vomiting, diarrhea, rash, conjunctivitis, headaches, and mucocutaneous manifestations and it can cause circulatory dysfunction, resulting in hypotension, shock, and end-organ injury in the heart and other organs and possibly death. In this study, we aimed to analyze the clinical spectrum, treatment options and outcomes of children with MIS-C who were admitted to our pediatric intensive care (PICU). Materials and Methods Clinical and laboratory findings and treatment of the patients admitted to the PICU with MIS-C between April 2020 and January 2021 were recorded, and their outcomes were evaluated. Results Nineteen patients with a median age of 12.5 years (interquartile range (IQR): 5.8-14.0 years) were admitted. Eleven (57.8%) were males. The most frequent clinical and laboratory features were fever (100%), abdominal pain (94.7%), rash (63.1%), headache (68.4%), diarrhea (47.3%), seizure (10.5%), cardiac dysfunction (52.6%), acute kidney injury (26.3%), lymphopenia (84.2%), and thrombocytopenia (36.8%). However, 8 patients needed mechanical respiratory support, 11 patients needed inotropes, 2 patients needed plasma exchange, and 1 patient needed continuous renal replacement therapy. All patients received corticosteroids, 17 patients (89.2%) received intravenous immunoglobulin, 2 patients received anakinra, 10 patients received acetylsalicylic acid, and 6 patients received enoxaparin. Median PICU length of stay was 3 days (IQR: 2-5) and only one patient died. Conclusion In conclusion, MIS-C may present with a variety of clinical manifestations, and it can lead to life-threatening critical illness. Most children need intensive care and the response to immunomodulation is usually favorable.

Evaluation of the Performance of Vasoactive Ventilation Renal Score in Predicting the Duration of Mechanical Ventilation and Intensive Care Hospitalization After Pediatric Cardiac Surgery.

Various methods have been used to evaluate the predictivity of some markers during the recovery process after cardiac surgery in children. The aim herein was to evaluate the vasoactive ventilation renal (VVR) score in predicting the clinical outcomes of children who underwent congenital cardiac surgery within the early period in the pediatric intensive care unit (PICU). Patients who underwent congenital heart surgery (CHS) between November 2016 and March 2020 were enrolled and evaluated prospectively. The VVR score was calculated as follows: vasoactive inotrope score (VIS) + ventilation index + (change in serum creatinine level based on the baseline value × 10). The relationship between the duration of mechanical ventilation and the length of stay (LOS) in the PICU was evaluated via receiver operating characteristic (ROC) curve analysis and the cut-off values were calculated. At all of the time points identified in the study, the VVR score had a higher area under the ROC curve (AUC) when compared to the VIS and serum lactate levels, and the 48-h VVR score had the highest AUC (AUC 0.851, 95% confidence interval (CI) 0.761-0.942/LOS in the PICU; AUC 0.946, 95% CI 0.885-1.000/duration of mechanical ventilation). The 48-h VVR score for the LOS in the PICU was 6.7 (sensitivity 70%, specificity 92%) and that for the duration of mechanical ventilation was 9.1 (sensitivity 87%, specificity 97%). As a result, in our study, it was found that the VVR score is a new and effective predictor of the duration of mechanical ventilation and LOS in the PICU in postoperative CHS patients.

Interhospital Aircraft/Ground Extracorporeal Membrane Oxygenation Transportation by a Mobile Extracorporeal Membrane Oxygenation Team: First Turkish Pediatric Case Series.

OBJECTIVE: Extracorporeal membrane oxygenation is a life-saving treatment for patients with circulatory and respiratory failure refractory to standard therapy. However, safe and timely patient transport to the referral extracorporeal membrane oxygenation center is critical for better patient outcomes in patients with acute cardiogenic shock. This study aimed to describe children's features who were transferred to our center under extracorporeal membrane oxygenation by aircraft/ground vehicle and demonstrated the importance of extracorporeal cardiopulmonary resuscitation for transported children. MATERIALS AND METHODS: We report the first Turkish pediatric case series of patients with acute cardiogenic shock transported by aircraft and ground ambulances on extracorporeal membrane oxygenation support to a referral extracorporeal membrane oxygenation center between January 2016 and January 2021. RESULTS: Overall, 6 patients on venoarterial extracorporeal membrane oxygenation support were transported by aircraft and ground vehicles to our pediatric intensive care unit. Transport was achieved by fixed-wing aircraft in 5 patients and commercial aircraft in 1. Our mobile extracorporeal membrane oxygenation team cannulated 3 patients, and 3 patients were cannulated by the team at the hospital they applied to. The median age was 112 (range: 14-204) months and the median weight was 28.6 kg (range: 8.6-57.2 kg). The etiology of acute cardiogenic shock was fulminant myocarditis in 4 patients, dilated cardiomyopathy in 1, and transposition of great arteries and atrial flutter in 1. The median distance of travel for the patients to our hospital was 618 (407-955) km. No adverse events were detected during aircraft or ground vehicle transport. CONCLUSION: Mobile pediatric extracorporeal membrane oxygenation transport teams may provide safe aircraft and ground vehicle transportation in high-risk patients with acute cardiogenic shock bridging to survival or long-term circulatory support.

The role and efficacy of routine high-sensitivity troponin T screening in paediatric COVID-19.

OBJECTIVE: We aimed to evaluate the efficacy and role of high-sensitivity troponin T in children with a confirmed SARS-CoV-2 infection and also the correlation of troponin T levels with symptoms, and echocardiographic findings were analysed. METHODS: Two hundred and fourteen patients with a confirmed SARS-CoV-2 infection between the dates of 28 March and 15 August 12020 were enrolled in this retrospective single-centre study. Patients with comorbidities and diagnosed as multisystem inflammatory syndrome in children were excluded. Demographic data, clinical and laboratory parameters were evaluated. The patients were classified and compared according to the troponin positivity. The correlation of troponin T with symptoms and echocardiographic findings was analysed. RESULTS: The most common symptoms in the whole study group were fever (53.3%) and cough (24.8%). Troponin T levels were elevated in 15 (7%) patients. The most common symptom in patients with troponin positivity was also fever (73.3%). Troponin T positivity was significantly higher in patients under the age of 12 months and troponin T levels were negatively correlated with age. C-reactive protein levels were elevated in 77 (36%) of the patients in the whole group and 7 (46.7%) of 15 patients with troponin positivity. C-reactive protein levels were similar between groups. CONCLUSION: Routine troponin screening does not yield much information in previously healthy paediatric COVID-19 patients without any sign of myocardial dysfunction. Elevated troponin levels may be observed but it is mostly a sign of myocardial injury without detectable myocardial dysfunction in this group of patients.

Temporary biventricular support as a bridge to recovery: A justifiable strategy for small children with fulminant myocarditis.

Short-term mechanical circulatory support can be life-saving in the pediatric population with acute cardiogenic shock (ACS). However, recovery from MCS is a rare entity. MCS options are limited for low-body-weight children in Turkey. Over the last decade, extracorporeal membrane oxygenation (ECMO) has been the primary bridging modality for children with end-stage heart failure in our country. However, VA-ECMO may cause increased wall stress and oxygen demand, which may alter myocardial recovery. Here, we describe using a Levitronix CentriMag Systems for biventricular support as a bridge to recovery in a 16-month-old boy (weight, 11 kg; BSA, 0.5 m2) with type A influenza related-fulminant myocarditis (FM). Levitronix CentriMag System provides a safe and efficient short-term, biventricular, paracorporeal support for infants, and small children with ACS.

Long-term follow-up of subvalvular aortic stenosis in children: a single-centre experience.

OBJECTIVE: The aim of this study is to evaluate clinical and surgical outcomes of children with subaortic stenosis, to determine the risk factors for surgery and reoperation and to compare isolated subaortic stenosis and those concomitant with CHDs. METHODS: The study involved 80 children with subaortic stenosis. The patients were first classified as isolated and CHD group, and the isolated group was further classified as membranous/fibromuscular group. The initial, pre-operative, post-operative and the most recent echocardiographic data, demographic properties and follow-up results of the groups were analysed and compared. The correlation of echocardiographic parameters with surgery and reoperation was evaluated. RESULTS: There was a significant male predominance in all groups. The frequency of the membranous type was higher than the fibromuscular type in the whole and the CHD group. The median time to the first operation was 4.6 years. Thirty-five (43.7%) patients underwent surgery, 5 of 35 (14%) patients required reoperation. The rate of surgery was similar between groups, but reoperation was significantly higher in the isolated group. The gradient was the most important factor for surgery and reoperation in both groups. In the isolated group besides gradient, mitral-aortic separation was the only echocardiographic parameter correlated with surgery and reoperation. CONCLUSION: Reoperation is higher in isolated subaortic stenosis but similar in membranous and fibromuscular types. Early surgery may be beneficial in preventing aortic insufficiency but does not affect the rate of reoperation. Higher initial gradients are associated with adverse outcomes, recurrence and reoperation.

A successful treatment with intravenous lipid emulsion therapy in a child with verapamil poisoning.

In recent years, intravenous lipid emulsion therapy (ILE) was used for lipophilic drug intoxications, and successful results were obtained. In the literature, there is a small number of reported cases about verapamil intoxication and ILE therapy in the pediatric age group. We used ILE therapy in a 14-year-old girl with verapamil intoxication in the 2nd h of the pediatric intensive care unit stay, before using traditional treatments such as glucagon and hyperinsulinemic euglycemia. She had resistant bradycardia and hypotension which was unresponsive to inotropic agents and a successful result was obtained after using ILE treatment. We believe our report may contribute to the early use of ILE therapy for toxicity with calcium channel blockers such as verapamil in pediatric patients.

Immobilization-induced symptomatic hypercalcemia treated with zoledronate in a child with a left ventricular assist device.

Differential diagnosis of hypercalcemia in children includes confirmation of hyperthyroidism, infection, inflammatory processes, and malignant tumors. Immobilization-induced hypercalcemia is rare in healthy individuals, although it can occur in adolescent males, especially after fracture. Immobility can cause increased skeletal calcium release and hypercalcemia, and this condition is also known as resorptive hypercalcemia. We present a case of a 10-year-old adolescent girl with advanced heart failure who underwent implantation with a HeartMate 3 left ventricular assist device. She had symptoms of abdominal pain, vomiting, and constipation on the fifth month of hospitalization. She subsequently developed immobilization-induced symptomatic hypercalcemia (serum calcium, 12.1 mg/dL; corrected calcium 12.8 mg/dL; parathormone, 1.9 pg/mL; calcium/creatinine ratio in spot urine, 1.21). However, hypercalcemia is uncommon in children with advanced heart failure. Bisphosphonate therapy was initiated because our patient did not respond to hydration and furosemide treatment, and she had persistent abdominal pain, vomiting, and constipation. The patient's complaints were resolved on the second day after administrating bisphosphonate, and hypercalcemia did not recur.

Echocardiographic screening for mitral valve prolapse in Turkish school children.

We determined the frequency of mitral valve prolapse (MVP) in healthy Turkish school children using the current echocardiographic diagnostic criteria. This epidemiological survey was performed on 2550 school children. All children were screened with echocardiography and the family of children with MVP were also screened. The prolapse of mitral leaflets into left atrium ≥ 2 mm in parasternal long-axis view was used as diagnostic criteria. MVP was classified as classical or non-classical according to anterior mitral leaflet thickness. The thickness of anterior mitral leaflet, the extent of prolapse, and the presence of mitral regurgitation were evaluated. The children were also questioned about the associated symptoms. The prevalence of MVP was 1.25% in children with a mean age of 11.1 ± 2.9 years. The prevalence was 0.9%, 1.2%, and 1.6% in 5-9 years, 10-13 years, and 14-18 years of age, respectively. 43.7% of the cases were classical MVP. The frequency of auscultation findings was 34.3%. 11/34 children had mitral regurgitation. There was no statistically significant difference between classical MVP and non-classical MVP in terms of mitral regurgitation, physical examination findings, and symptoms. Anxiety (37.5%) was the most common symptom. The frequency of MVP in the first-degree relatives of children with MVP was 11/84 (13.1%). Most patients with MVP don't have auscultation findings and symptoms, therefore echocardiography is an important tool in the diagnosis of MVP. It is also reasonable to screen first degree relatives of MVP patients with echocardiography.

Tissue Plasminogen Activator Use in Pediatric Patients: A Single Center Experience.

INTRODUCTION: Thrombosis is rare in children and antithrombolytic treatment is controversial. Most commonly used thrombolytic agent is tissue plasminogen activator (t-PA) in pediatrics. In this study, we report our experience in the use of thrombolytic treatment. METHODS: Eighteen patients who had received systemic t-PA between January 2006 and December 2013 were recorded. The response to t-PA was evaluated as complete, partial, and no. The bleeding complication during t-PA administration was graded as minor or major. RESULTS: There were 18 patients (2 mo to 12 y) who received systemic t-PA. Three patients had venous, 14 patients had arterial, and 1 patient had intracardiac thrombosis. Thrombosis was related to cardiac catheterization (61.1%), central venous catheterization (16.7%), cardiac surgery (11.1%), and arrhythmia (5.5%). In 1 patient thrombosis occurred spontaneously (5.5%). Eighteen patients received 25 courses of systemic t-PA (0.15 to 0.3 mg/kg/h). A total of 55.6% of cases had complete, 27.8% had partial, and 16.6% showed no resolution. CONCLUSION: t-PA infusion at doses of median 0.2 mg/kg/h (0.15 to 0.3) seems effective and safe. There is still no consensus on indications and dosing of antithrombolytic treatment in children but in selected patients it decreases long-term complications due to thrombosis.