bluuebunny/crossref_metadata_2025_split huggingface dataset:
Magnetic resonance imaging in patients after a modified Fontan operation
Authors: Stern Heiko , Bauer Richard , Schrötera Gerrit , Sauer Ursula , Emmrich Peter , Bühlmeyer Konrad 
Published: August 2008

SummaryMagnetic resonance imaging was performed in 26 patients who underwent a modified Fontan procedure. Their age ranged from 1.8 to 31 years with a mean of 12.2 years. A valveless anastomosis was performed between the right atrium and the rudimentary right ventricle in 12 patients and between the right atrium and the pulmonary arteries in 10 patients. A cavopulmonary connection was established in the remaining four patients. Spin echo and gradient echo scans of the heart were performed in orthogonal and angulated projections. The cross-sectional area of the atrioventricular, atriopulmonary or cavopulmonary anastomoses was measured using diameters in two orthogonal imaging planes. Recordings were examined for the presence of right atrial thrombosis, the site of drainage of the coronary sinus, compression of the pulmonary veins, as well as for the presence and extent of pericardial effusions. Cine recordings were used for the assessment of the pattern of flow within the right atrium. The cross-sectional area of the anastomoses could be determined in 24 of 26 patients. This was not statistically different between patients with different surgical procedures. Patients with a cavopulmonary connection, however, tended to have a smaller anastomosis (mean 1.4 cm2/m2BSA, S.D. 0.62) than patients with atrioventricular (mean 3.0 cm2/m2, S.D. 2.1) or atriopulmonary (2.4 cm2/m2, S.D. 1.1) connections. When compared to normal values for the size of the tricuspid valve, the size of the anastomosis was within the normal range in only four patients, it was larger in one and smaller in 19 patients. There were signs of right atrial thromboses in the scans in eight of 26 patients, as observed by two independent investigators. The site of drainage of the coronary sinus was imaged in 20 of 26 patients and was in accordance with the description of surgical procedure in eight. Compression of the right pulmonary veins by an enlarged right atrium was present in seven patients. This was severe in two children. Presence and extent of pericardial effusions could be adequately assessed in 11 of26 patients. Systolic regurgitation from the rudimentary right ventricle into the right atrium was shown in eight of 12 patients with an atrioventricular valveless anastomosis. Cine recordings revealed slow forward flow from the right atrium into the pulmonary arteries in seven of 22 patients, and there was a markedly altered pattern of intraatrial flow in two patients with anomalous systemic venous connections. Magnetic resonance imaging allows adequate examination of right atrial anatomy, determination of the size of the anastomosis with the pulmonary arteries, and semiquantitative assessment of pulmonary blood flow in the majority of patients after a modified Fontan procedure.
Echocardiographic measurements in adolescents based upon gender and sexual maturity rating
Authors: Pearl William , Stafford Elisabeth M. , Martinko Thomas , Villazana Robert , Lucker William , Schydlower Manuel , Imai Walter 
Published: August 2008

SummaryM-mode echocardiograms were recorded from 298 healthy adolescents between 10 and 16 years of age. Nineteen measured and 10 calculated parameters were correlated with the subjects’ gender and sexual maturity rating. Significant (p<0.05) differences by gender were demonstrated for 21 of 29 parameters. Sexual maturity rating had a significant effect on four of 29 parameters for boys and on five of 29 parameters for girls, when controlling for body surface area. Fourteen of 29 parameters in boys and three of 29 parameters in girls showed a significant effect of sexual maturity rating when controlling for age. The male adolescent growth spurt in lean body mass is paralleled by a similar growth spurt in left ventricular volume.
Balloon atrial septostomy in the intensive care unit under echocardiographic control—nine years experience
Authors: Kakadekar Ashok P. , Hayes Alison , Rosenthal Eric , Huggon Ian C. , Baker Edward J. , Qureshi Shakeel A. , Tynan Michael 
Published: August 2008

SummaryBetween December 1982 and April 1991, balloon atrial septostomy was performed in the intensive care unit under echocardiographic control in 60 neonates. Of the patients, 58 had complete transposition. Two patients had double outlet right ventricle with a sub-pulmonary ventricular septal defect. Associated lesions included a patent arterial duct in 19 patients, ventricular septal defect in nine, obstruction of the left ventricular outflow tract in six, aortic coarctation in two and tricuspid atresia in one. The mean age at septostomy was four days (range 4 hours - 25 days) and the mean weight 3.19 kg (range 1.17–4.25 kg). In 39 (65%) patients, an infusion of prostaglandin was in progress prior to the septostomy and 22 (37%) were being ventilated. Standard subcostal four-chamber echocardiographic views were used to show the atrial septum and to guide the catheter used for septostomy. Venous access was obtained via the femoral vein in 43 (by percutaneous puncture in 40 and by cutdown in three) and the umbilical vein in 17. Transient atrial arrhythmias were common during the septostomy but no acute hemodynamic disturbances or deaths occurred during the procedure. The size of the atrial septal defect as measured by echocardiography after the septostomy ranged from three to 12 mm in diameter. In only one patient was this inadequate. Three (5%) patients died between two and 10 days after the septostomy, two due to necrotizing enterocolitis and one from persistent hypoxemia. One patient had a cerebral thrombosis and convulsions immediately after the septostomy but made a good neurological recovery. Corrective surgery was performed in 52 (86.6%), two (3.3%) had palliative surgery and two were considered unsuitable for total correction, of whom one has died. One patient died whilst awaiting correction. We conclude that balloon atrial septostomy using echocardiographic guidance can be safely and effectively performed in the intensive care unit.
Doppler evaluation of physiologic peripheral pulmonic stenosis in newborns
Authors: Friedman Deborah M. , Fernandes John , Rutkowski Monika , Danilowicz Delores 
Published: August 2008

AbstractA common systolic ejection murmur of the neonate has been attributed to physiologic peripheral pulmonic stenosis. We investigated this auscultatory finding using duplex pulsed Doppler. Three groups of normal fuliterm neonates less than one week old were studied—10 without murmurs, 10 with grade 1/6 murmurs and nine with at least grade 2/6 murmurs. We measured the anatomical size and peak flow velocities in the main pulmonary artery and left and right branches, the peak velocity in the right ventricular outflow tract, and the bifurcation angle. Flow gradients were calculated as 4 (Vmax)2 Groups were compared by t-tests. A loud peripheral pulmonic stenosis murmur was associated with increased pulmonary artery velocities, with left pulmonary artery velocity the most discriminating variable (1.3 ± 0.29 vs 0.94 ± 0.19 m/s; p ≤ 0.05). Although the peak gradient never exceeded 12 mmHg, there was an increased gradient in the loud murmur group (8.7 ± 2.6 vs 5.7 ± 2.2 mmHg; p ≤ 0.05) which may even be underestimated by the lack of angle correction. The left pulmonary artery diameter was also larger in the loud murmur group, but there were no other anatomic or volumetric flow differences between groups. The soft murmur group could not be separated from normals. We conclude that Doppler techniques can confirm the physiologic basis of peripheral pulmonic stenosis murmurs.
Renal artery Doppler blood velocity waveforms in children with aortic coarctation
Authors: Friedman Deborah M. , Schacht Robert G. , Rutkowski Monika , Doyle Eugenie F. , Danilowicz Delores 
Published: August 2008

AbstractNoninvasive translumbar renal artery Doppler blood flow patterns were obtained in 20 normal children, 11 with successfully repaired coarctation, and eight with native or restenosed coarctation. Native or restenosed lesions result in decreased relative systolic velocity and prolonged acceleration time. After successful surgery, the renal flow returns to near normal. This technique may provide a useful tool to explore and predict hemodynamic and renal physiologic changes, and follow the course of therapy.
Tricuspid valve endocarditis on a healthy valve—potentially lethal in infants and young children
Authors: Levin Solomon E. , Dansky Raymond , Benatar Avram , Milner Selwyn 
Published: August 2008

SummaryTricuspid valve endocarditis on a normal valve has been rarely documented in children. In all five previous cases the infecting organism was Staphylococcus aureus. We report five infants and children with tricuspid valve endocarditis, whose ages ranged from four months to four years. In all of them large vegetations were identified by two-dimensional echocardiography. Positive blood cultures were found in four of five patients. Staphylococcus aureus, Corynebacterium species, Haemophilus influenzae and Candida albicans were the respective isolates. There were three deaths, all relatively sudden, 10–33 days after commencement of antibiotic therapy. At the only post mortem carried out in the patient with Candida albicans endocarditis and Down syndrome, there were two large fungating masses straddling the tricuspid valve. They appeared to have obstructed the circulation. Microscopic examination of a lymph node and the thymus showed features consistent with an immune deficiency syndrome. One child has been lost to follow-up. In the remaining survivor, progressively severe tricuspid regurgitation with congestive cardiac failure, necessitated open heart surgery 13 months later. A homograft replacement of the destroyed septal leaflet was carried out. Tricuspid valve endocarditis in an infant or child is a serious and potentially lethal condition. Early surgical intervention to remove large obstructive vegetations appears to be warranted.
The cardiac conduction system in Hurler syndrome: pathological features and clinical implications
Authors: Chow Louis Tsun-cheung , Chow Wing-Hing 
Published: August 2008

SummaryWe studied the cardiac conduction system in a case of Hurler syndrome. There was dense fibrosis of the supporting matrix of the sinus node and accumulation of mucopolysaccharide in the nodal cells. The bundle branches showed prominent hydropic degeneration, being encased and punctuated by dense fibrous tissue. These changes in the conduction system may predispose to the development of arrhythmias, accounting for the sudden deaths in Hurler syndrome.
Replacement of the aortic valve in tetralogy of Fallot prior to intracardiac repair—a case report
Authors: Aru Giorgio M. , Cirio Emiliano , Martelli Valentino 
Published: August 2008

AbstractA 21-year-old woman with tetralogy of Fallot, who had undergone a right Blalock-Taussig shunt at one year of age, developed endocarditis of the aortic valve. Septic thrombosis of the right pulmonary artery was diagnosed by intraoperative transesophageal echocardiography. Replacement of the aortic valve initially performed by a St. Jude Medical prosthesis, was unsuccessful due to immobilization of the valve occluder. Subsequent replacement of the St. Jude valve by a Carpentier-Edwards valve was uneventful. Thrombectomy and patch enlargement of the right pulmonary artery were also performed successfully. We suggest that the St. Jude Medical valve should be employed with caution for replacement of the aortic valve in patients with tetralogy of Fallot who have not undergone intracardiac repair. Transesophageal echocardiography is extremely useful in discovering undiagnosed associated lesion such as septic thrombosis of the pulmonary arteries.
Diagnostic aspects, carditis and other acute manifestations of streptococcal infection
Authors: de Carvalho Coelho Mota Cleonice , Meira Zilda Maria Alves , Graciano Rosangela Nicoli , Silva Marly Conceição 
Published: August 2008

AbstractWe have conducted, in two stages, a descriptive and comparative analysis of the diagnostic and evolutionary clinical aspects of rheumatic fever. The descriptive analysis was based on a sample of 226 patients seen between 1976–1986. The forms and frequency of the manifestations of rheumatic fever were studied, as well as the difficulties encountered in diagnosing mild cases and the risk of making a hasty diagnosis due to the high prevalence of the disease. Subsequent to the establishment of an outpatient clinic for referral of patients with rheumatic fever, as part of a study and control program for the disease, 98 patients were seen in the period 1988–1991. In order to compare the profile of the manifestations in the acute phase with evolutionary aspects over the course of the disease, a subgroup of 61 children, treated in the period 1983–986 was selected to obtain equivalence in size of sample and time of follow-up (p = 0.08). The comparative analysis revealed that no modifications have occurred over the period of study in the profile of the manifestations during the acute phase, and no statistically significant differences have occurred in age at first attack, severity ofcarditis, or in the type ofvalvar and articular involvement. Evolutionary data after rigid control of primary and secondary prevention, however, showed a marked reduction in the incidence of recurrence (p = 0.036), the frequency of hospital admission (p = 0.001) and deaths (p = 0.024). The main factors modifying the evolution of the disease were analyzed. The action of the health team had a fundamental importance in the control of recurrence. This fact is especially important for developing countries, where a reduction of the prevalence of the disease can only be achieved through major structural socioeconomic changes in the community.
Echocardiographic diagnosis of rheumatic fever and rheumatic valvar disease
Authors: Medeiros Caio César Jorge , de Moraes Alvaro Villela , Snitcowsky Rachel , Graziosi Pedro Mauro , de Figueiredo Neto José Albuquerque , Filho José Rodrigues Parga , Bellotti Giovanni , Pileggi Fulvio 
Published: August 2008

SummaryWe studied 56 children echocardiographically, ages four to 15 years (mean nine years) with acute rheumatic fever to determine the extent of cardiac involvement. All had a clinical diagnosis of carditis. Mitral regurgitation was always present and was associated with aortic regurgitation in 53.6% and tricuspid regurgitation in 32.1%. Mitral valvar prolapse was observed in 18 patients 5(32.1%) and could not be differentiated from myxomatous prolapse in 10 (17.8%). Cordal rupture was detected in seven patients (12.5%), three of whom required surgical treatment. Other findings concerning the mitral valve were vegetations in two patients (3.6%), commissural fusion without stenosis in 36(64.3%), and mitral stenosis in four (7.1%). Heart failure was usually secondary to valvitis rather than myocarditis, and led to surgical treatment in seven patients. The myocardial function was depressed in only two patients. In both, the ejection function returned to normal after medical treatment. Echocardiography provides important information on the involvement of the heart in acute rheumatic fever, helping to determine prognosis and the results of treatment.
Surgical treatment of acute episodes of rheumatic fever
Authors: Pomerantzeff Pablo Maria Alberto , Snitcowsky Rachel , Trevisan Isabelle Vianna , Marcial Miguel Barbero , Verginelli Geraldo , Jatene Adib D 
Published: August 2008

AbstractEight patients, four males and four females, age five to 13 years old (average: 11 years) have undergone surgery in the acute phase of rheumaticfever. The patients presented a history of rheumatic activity characterized by the presence of migratory arthritis and carditis. All patients had severe acute mitral insufficiency, while one of them had associated aortic insufficiency. Laboratory examinations revealed the presence of an acute inflammatory condition. All patients had acute heart failure and were treated initially with high doses of diuretics, peripheral vasopressor and vasodilator amines, together with cardiotonic drugs, without improvement. Surgical treatment was indicated after a period of observation between 24 hours and five days. In five patients, the Doppler echocardiogram revealed rupture and elongation of tendinous cords. Two of them had acute dilatation of the mitral ring, and one had isolated acute dilatation of the mitral ring. Five patients underwent valvar replacement and, in three, valvar repair was carried out. Two patients, who were in cardiogenic shock at the time of their referral, died in the operating room following replacement of the mitral valve. All patients who underwent repair of the mitral valve were in good condition at the last follow-up, six to 27 months after surgery.
Surgery for rheumatic lesions of the cardiac valves in the young
Authors: Lucchese Fernando A. , Sant'Anna João Ricardo M. , Kalil Renato A. K. , Sarmento Leite Rogério E. , Prates Paulo R. , Nesralla Ivo A. 
Published: August 2008

SummaryAlthough declining in the so-called “first world,” surgery for rheumatic valvar lesions in patients less than 16 years of age is still a challenging problem in lesser developed countries. From 1970 to 1990, we operated upon and followed-up 136 children (less than 16 years) with different valvar lesions, performing various surgical procedures. The mitral valve was most frequently affected (52.9%) followed by multiple valvar disease (39.7%) and aortic (7.3%) involvement. The operations performed were valvoplasties (67), valvar replacement (49), and combined procedures (20). Hospital mortality for the overall group was 10.2%. There were 71 reinterventions in the follow-up of 20 years. Actuarial survival was 60.3% including hospital mortality. The event-free actuarial survival showed that 91% had at least one major event which required reoperation or hospital treatment, or else invasive cardiac procedures. We conclude that rheumatic valvar disease is still a challenging problem in our country, and that the severity of the illness is directly related to the younger age patients. In spite of reasonable long-term survival, very few patients had an uneventful follow-up after surgery.
Long-term observations of rheumatic carditis
Authors: Aziz Kalim-ud-Din , Cheema L. , Memon A.D. 
Published: August 2008

AbstractA total of 246 consecutive patients were seen with the diagnosis of acute rheumatic fever (and/or rheumatic heart disease) and were followed for 587.7 patient years. The episode of acute rheumatic fever was the first in 64 of these patients, whereas recurrent acute rheumatic fever was seen in 26 and the other 156 patients had chronic rheumatic carditis. At presentation, those suffering an initial attack had less frequent and less severe carditis when compared to those suffering recurrent infection (p<0.05). Improvement in carditis during follow-up was noted in those having an initial attack (p<0.1), while deterioration occurred following recurrent infection (p<0.01), and no change was noted for those with chronic infection. Recurrences of acute rheumatic fever were most frequent in those presenting with their initial infection (21%) or reinfection (35%), and dropout from follow-up was highest in the group with first infection (38%) compared to those with recurrent infection (15%) and chronic carditis (25%). Non-recognition of the first episode of acute rheumatic fever and failure of secondary prophylaxis were found to be the major contributors to the observed increased pool of recurrent and chronic rheumatic heart disease. We conclude that, in the absence of programmed primary prophylaxis of acute rheumatic fever, the best chance of controlling the progression of carditis or affecting cure is to recognize the first episode ofacute rheumatic fever and then ensure strict adherence to secondary prophylaxis. Since the prognosis of recurrent carditis is poor, the best management of moderate to severe recurrent carditis is early reparative valvar surgery wherever possible.
Co-existence of congenital and rheumatic heart disease in 404 post-mortem cases—comparison with findings in 2,352 cases with isolated rheumatic disease
Authors: Zabal Carlos , Attie Fause , Buendía Alfonso , Calderón Juan , Troyo Paris , Guzzo Daniel 
Published: August 2008

SummaryWe reviewed 2,756 necropsy studies of patients who died because of rheumatic heart disease. The anatomic material was divided into two groups. The first group was made up of 404 cases (14.6%) having the association of rheumatic and congenital heartdisease. The second group comprised 2,352 cases with isolated rheumatic heart disease. The analysis of the site and types of congenital malformations in the first group showed 160 cases (39.6%) with aortic, 112 (27.7%) with pulmonary, 15(3.7%) with tricuspid and six (1.5%) with mitral lesions. Twenty patients (4.9%) had an atrial septal defect whilenine (2.2%) had patency of the arterial duct and four (1 %) a ventricular septal defect. The incidence of rheumatic aortic valvar disease in cases also having congenital lesions of the aortic valve (83.7%) was higher than in patients with isolated rheumatic involvement of the aortic valve (67.7%) (p<0.001). The difference in the incidence of rheumatic lesions found in patients with congenital pulmonary lesions (9.8%) and in the patients with isolated rheumatic disease (3.3%) was also significant (p<0.001). No differences were observed in rheumatic lesions to the mitral and tricuspid valves in those with or without associated congenital lesions. In patientswith an atrial septal defect, there was a higher incidence of combined mitral and tricuspid lesions (35% vs. 18%, p<0.02). Patients with patency of the arterial duct andco-existing rheumatic heart disease had a greater incidence of isolated rheumatic aortic disease (11% vs. 0.7%), and also of combined aortic and mitral lesions (33% vs. 17%), but the differences were not significant. The incidence of involvement of all four valves was 5.4% in those with associated congenital lesions and 3% in those in which rheumatic involvement was isolated (p<0.O2). We conclude that rheumatic heart disease has a tendency to involve preferentially cardiac valves that are the sites of congenital malformations.
Cot death and myocarditis
Authors: Rambaud Caroline , Cieuta Cécile , Canioni Danielle , Rouzioux Christine , Lavaud Jean , Hubert Philippe , Brousse Nicole , Rudler Michelle , Chéron Gérard 
Published: August 2008

SummaryWe have investigated the hearts from 153 infants found dead in their cots at ages ranging from one month to one year. The deaths occurred over a period of five years (January 1986 to December 1990) and were studied in a center for the study of the sudden infant death syndrome located in Paris. The epidemiological characteristics of this group are:male predominance (sex ratio 1.43), age less than four months (82%), and a predominance of winter deaths. These are the characteristic features ofthe sudden infant death syndrome. Ofthe 143 children studied with the permission of their parents, 24 (16.8%–12 girls and 12 boys) had histological lesions consistentwith myocarditis according to the Dallas criteria. The histological diagnosis of myocarditis is based on the association of cellular necrosis with a mononuclear or mixed inflammatory infiltrate. Cytoplasmic vacuolization, the presence of inflammatory cells in myocytes, and rupture of the cell walls of myocardial fibres are the equivalent histological signs of cellular necrosis. Myocarditis was diversely associated with respiratory, hepatic, muscular, gastrointestinal and/or neurological involvement. Twelve infants had previously been ill. Two died during the course of a serious illness. In only four cases was a viral association demonstrated. This incidence of myocardial involvement, similar to thatdescribed elsewhere in the literature, suggests that myocarditis could be a pathogenic explanation of some deaths thought on general autopsy investigation to be sudden and unexplained.