1,720,972 research outputs found
Is it possible to percutaneously close an atrial septal defect in babies who weigh less than four kilograms? Report of a successful case
No full textJ Cardiovasc Med (Hagerstown). 2008 Sep;9(9):929-31.
Is it possible to percutaneously close an atrial septal defect in babies who weigh less than four kilograms? Report of a successful case.
Maschietto N, Bonato R, Milanesi O.
Source
Department of Pediatrics, Cardiac Unit, University of Padua, Padua, Italy. [email protected]
Abstract
A 14-mm Amplatzer septal occluder was implanted in a 3.8-kg baby with a fenestrated atrial septal defect. The patient was eligible for percutaneous closure because of the high surgical risk due to his poor condition. In conclusion, despite the low weight of the baby, the Amplatzer septal occluder proved to be safe and effective.
PMID:
18695432
[PubMed - indexed for MEDLINE
Transapical aortic balloon valvuloplasty in a 890-gram infant: hybrid is better!
Full text linkCatheter Cardiovasc Interv. 2011 Jan 1;77(1):112-4. doi: 10.1002/ccd.22754.
Transapical aortic balloon valvuloplasty in a 890-gram infant: hybrid is better!
Maschietto N, Vida V, Milanesi O.
Source
Department of Pediatrics, Pediatric Cardiology Unit, [corrected] University of Padova, Padova, Italy. [email protected]
Erratum in
• Catheter Cardiovasc Interv. 2011 Sep 1;78(3):491.
Abstract
Balloon aortic valvuloplasty has become in many centers the treatment of choice for neonates with critical or severe aortic stenosis. Usual approaches both antegrade and retrograde can be problematic in preterms extremely low birth weight babies. We describe a novel approach for dilating the aortic valve in an 890 grams baby.
Copyright © 2010 Wiley-Liss, Inc.
PMID:
20824755
[PubMed - indexed for MEDLINE
A concert in the heart. Bilateral melody valve implantation in the branch pulmonary arteries.
No full textPatients undergoing right ventricular outflow tract reconstruction are subject to valve and cusp degeneration later in life, requiring further intervention to alleviate the pulmonary regurgitation that ensues. In these cases, percutaneous pulmonary valve implantation can be an effective alternative to surgery; however, since the indications have been limited to dysfunctional valved conduits, only a small number of patients have access to this treatment option. We present the case of an 18-year-old male with a patch-enlarged right ventricle to pulmonary artery conduit who underwent pulmonary valve implantation using two Melody transcatheter pulmonary valves (Medtronic, Inc) into the proximal right and left branch pulmonary arteries
Surgical re-utilization of a pulmonary valve graft after failed percutaneous treatment.
No full textJ Heart Valve Dis. 2010 Mar;19(2):260-2.
Surgical re-utilization of a pulmonary valve graft after failed percutaneous treatment.
Vida VL, Speggiorin S, Maschietto N, Padalino MA, Milanesi O, Carminati M, Stellin G.
Source
Department of Pediatric and Congenital Cardiac Surgery, University of Padua, Padua, Italy. [email protected]
Abstract
The case is reported of a 22-year-old woman with severe right ventricular outflow tract (RVOT) homograft regurgitation and stenosis, after the repair of tetralogy of Fallot and complete atrioventricular canal, who was scheduled for percutaneous pulmonary valve implantation. In the catheterization laboratory, immediately after implantation, the stented pulmonary valve became dislodged back into the right ventricle. The patient required an emergency re-sternotomy in the operating room. When the RVOT had been incised the stented valve was rescued and successfully repositioned under direct surgical vision. The patient had an uneventful clinical outcome and was discharged home in good clinical condition, with a new, well-functioning pulmonary valve.
PMID:
20369515
[PubMed - indexed for MEDLINE
Three-dimensional echocardiographic evaluation of right ventricular volume and function in pediatric patients: Validation of the technique
No full textJ Am Soc Echocardiogr. 2007 Aug;20(8):921-9. Epub 2007 Jun 6.
Three-dimensional echocardiographic evaluation of right ventricular volume and function in pediatric patients: validation of the technique.
Grison A, Maschietto N, Reffo E, Stellin G, Padalino M, Vida V, Milanesi O.
Source
Department of Pediatrics, University of Padova, School of Medicine, Padova, Italy.
Abstract
The right ventricle (RV) is the main ventricular chamber in many congenital heart diseases before and after surgical correction, and it is the most important determinant of outcome in postoperative tetralogy of Fallot and other complex malformations. Unfortunately its irregular crescentic shape does not allow the use of the geometric assumption used for the left ventricle. Many methods have been suggested in the literature to overcome this problem, none fully reliable. The introduction of volume-rendered 3-dimensional (3D) reconstruction of echocardiography images provides a tool for the direct measurement of cardiac chambers, not based on geometric assumptions. The aim of this research study was to determine the accuracy of 3D echocardiography (3DE) to measure RV volumes in pediatric patients with secundum atrial septal defects, compared with direct volume measurements performed during the intervention. We performed 3DE study in the operating department, with the patient anesthetized, intubated, and ventilated before the surgical procedure. Sequential 2-dimensional echocardiographic images for subsequent 3D rendering were acquired using an ultrasound machine with a transthoracic 4-MHz rotational or 5-MHz transesophageal omniplane probe; in the last 5 patients a machine was used that was equipped with a 3600-crystal real-time 3D probe. To validate the 3DE measurements, these were compared with the volume of the RV directly measured in the operating department, at the end of the surgical procedure, injecting saline solution through the tricuspid valve, using a graduate syringe. Among 25 pediatric patients enrolled in the study, with an age range of 1 and 14 years (mean 4 years) and a weight range of 8.5 to 57.4 kg (mean 18.6 kg), in 23 a mean of 3 echocardiographic acquisitions were performed and compared with the direct measurement. A close comparison was found between RV volumes measured by 3DE and direct volume measurements (P < .00001). The regression line, shifted toward the y axis, which describes the 3DE volumes, indicated that the echocardiographic measures overestimate the surgical ones. In our study this overestimation had the mean of 9% with values comprised between 3% and 19%. The coefficient of repeatability was 4.79 mL with all the values within this range (2 SD of the mean). We conclude that 3DE provides an accurate measurement of RV volume in pediatric patients with RV volume overload. It is a reliable, noninvasive, and nongeometric method of evaluation of the volume of this chamber, and can be considered a precious tool in the armamentarium of the pediatric cardiologist
One-and-a-Half Ventricle Repair as a Surgical Alternative to Fontan Revision in an Adult.
No full textPulmonary hypertension in sickle cell disease children under 10 years of age
No full textBr J Haematol. 2010 Sep;150(5):601-9. Epub 2010 Jun 10.
Pulmonary hypertension in sickle cell disease children under 10 years of age.
Colombatti R, Maschietto N, Varotto E, Grison A, Grazzina N, Meneghello L, Teso S, Carli M, Milanesi O, Sainati L.
Source
Department of Paediatrics, University of Padova, Padova, Italy. [email protected]
Abstract
Despite the finding of elevated Tricuspid Regurgitant Velocity (TRV) in children below 5 years of age, the prevalence and evolution of Pulmonary Hypertension (PH) in young children with sickle cell disease (SCD) are unclear. In order to identify predictive factors of precocious PH development, SCD children > or =3 years old, at steady state, underwent annual echocardiography and Tissue Doppler Imaging (TDI). Patients receiving chronic transfusion were excluded. Thirty-seven of seventy-five patients were > or =3 years, with measurable TRV. In our young population (mean age 6.2 years) of mainly African, HbS/HbS patients, 8/37 (21.6%) had TRV > or =2.5 m/s, 8% being only 3 years old. Significant correlation was found between precocious TRV elevation and high platelet and reticulocyte counts and frequent acute chest syndromes (ACS). In multivariate analysis, ACS was the only variable predicting TRV > or =2.5 m/s. TDI of the 37 patients showed signs of diastolic dysfunction of the left ventricle. At follow-up all eight patients with high TRV displayed further increase and seven more developed TRV > or =2.5 m/s. PH seems to begin in children earlier than expected. Factors involved in its early onset might be different from the ones causing its development in older children or adults. African children might benefit from early screening and re-assessment once a year.
PMID:
20553267
[PubMed - indexed for MEDLIN
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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