Pediatric cardiology
-
Pediatric cardiology · Aug 2013
Case ReportsFontan conversion templates: patient-specific hemodynamic performance of the lateral tunnel versus the intraatrial conduit with fenestration.
Intraatrial-conduit Fontan is considered a modification of both extracardiac and lateral-tunnel Fontan. In this study, the patient-specific hemodynamic performance of intraatrial-conduit and lateral-tunnel Fontan with fenestration, considered as conversion templates, was investigated based on the authors' patient cohort. Pulsatile computational fluid dynamics simulations were performed using patient-specific models of intraatrial-conduit and lateral-tunnel Fontan patients. ⋯ Hepatic flow majorly favored the left lung in both surgical connections: conversion from lateral-tunnel to intraatrial-conduit Fontan resulted in better hemodynamics with less power loss, a lower pressure gradient, and fewer stagnant flow zones along the conduit. This patient-specific computational case study demonstrated superior hemodynamics of intraatrial-conduit Fontan over those of lateral-tunnel Fontan with or without fenestration and improved performance after conversion of the lateral tunnel to the intraatrial conduit. The geometry-specific effect of the nonuniform hepatic flow distribution may motivate new rationales for the surgical design.
-
Pediatric cardiology · Aug 2013
Comparative StudyWhat factors predict long-term survival and valve durability in patients with atrioventricular valve regurgitation in single-ventricle physiology?
Although significant atrioventricular valve regurgitation (AVVR) is well known for its association with increased morbidity and mortality in patients with single-ventricle physiology, there is a lack of consensus in management of AVVR. The purpose of this study was to analyze the clinical outcomes in patients receiving AVV repair or replacement. From 2001 to 2010, a total of 33 patients (25 male and 8 female) with more than moderate-degree AVVR among 160 patients who underwent staged single-ventricle palliation were included. ⋯ Early valve regurgitation affects valve durability. Thus, successful repair in the early stage may improve later outcomes. Therefore, aggressive valve surgery was required and AVV replacement might be one of the options for selected patients.
-
Pediatric cardiology · Aug 2013
Multicenter Study Comparative StudyCharacterization of extracorporeal membrane oxygenation for pediatric cardiac arrest in the United States: analysis of the kids' inpatient database.
To characterize the overall use, cost, and outcomes of extracorporeal membrane oxygenation (ECMO) as an adjunct to cardiopulmonary resuscitation (CPR) among hospitalized infants and children in the United States, retrospective analysis of the 2000, 2003, and 2006 Kids' Inpatient Database (KID) was performed. All CPR episodes were identified; E-CPR was defined as ECMO used on the same day as CPR. Channeling bias was decreased by developing propensity scores representing the likelihood of requiring E-CPR. ⋯ Median LOS and charges are considerably greater for E-CPR survivors with C-CPR survivors. In this retrospective administrative database analysis, E-CPR did not significantly influence survival. Further study is needed to improve outcomes and to identify patients most likely to benefit from this resource-intensive therapy.
-
Pediatric cardiology · Aug 2013
Comparative StudyHigh-frequency oscillatory ventilation for cardiac surgery children with severe acute respiratory distress syndrome.
Acute respiratory distress syndrome (ARDS) in children after open heart surgery, although uncommon, can be a significant source of morbidity. Because high-frequency oscillatory ventilation (HFOV) had been used successfully with pediatric patients who had no congenital heart defects, this therapy was used in our unit. This report aims to describe a single-center experience with HFOV in the management of ARDS after open heart surgery with respect to mortality. ⋯ Multiple regression analyses indicated that pulmonary hypertension and recurrent respiratory tract infections (RRTIs) before surgery were independent predictors of in-hospital mortality. The findings show that HFOV is an effective and safe method for ventilating severe ARDS patients after corrective cardiac surgery. Pulmonary hypertension and RRTIs before surgery were risk factors for in-hospital mortality.
-
Pediatric cardiology · Aug 2013
Comparative StudyCharacteristics and hemodynamic effects of extubation failure in children undergoing complete repair for tetralogy of Fallot.
This study aimed to identify the prevalence, etiology, and outcomes of extubation failure in children after complete repair for tetralogy of Fallot at a single tertiary-care, academic children's hospital. The secondary aim of this study was to determine the cardiorespiratory effects of the transition from positive-pressure ventilation to spontaneous breathing in children with extubation success and extubation failure. For this study, extubation was defined as the need for reintubation within 96 h after extubation. ⋯ The majority of extubation failures in these patients occurred in the first 24 h. Extubation success in the children after repair for tetralogy of Fallot was associated with improvement in PaO2, tachycardia, and mean arterial pressure, with a decrease in inotrope score. Extubation failure is associated with a longer hospital stay.