Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für Herz-, Thorax- und Gefässchirurgie 14 (2000), S. 231-238 
    ISSN: 0930-9225
    Keywords: Schlüsselwörter Aortenklappe – linksventrikuläre Ausflussbahn – Chirurgie – Resultate ; Key words Aortic valve – surgery – results – left ventricular outflow tract
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Pathologies of the left ventricular outflow tract and of the ascending aorta are relatively rare congenital lesions. We assessed the early outcome and long-term follow-up of neonates, children and adolescent patients who were treated surgically because of a pathology of the left ventricular outflow tract (subaortic stenosis and/or valvular aortic stenosis) or of the ascending aorta.¶   Between 1984 and 1999, 96 patients were treated in our institution: 68 patients underwent a primary operative procedure, 22 had a redo-intervention whereas in 6 patients a re-re-intervention was performed. Primary isolated valvotomy was performed in 30 neonates or young children below 6 months. In the group requiring redo-surgery, the following procedures were performed: repeated valvotomy with or without reconstruction of the valve by commissural plication or cusp extension (n=8), valve replacement with homograft (n=10), with mechanical (n= 7) and biological prosthesis (n=3). In patients with a subaortic obstruction, a membranous stenosis was resected in 10, a muscular resection was performed in 5 and in 3 patients a more complex procedure (Ross-Konno) was performed.¶   The following surgical procedures were performed in those patients presenting with a pathology of the aortic root and/or of the ascending aorta: aortic root replacement with preservation of the native valve (n=5), composite graft replacement (n=4) and homograft mini-root (n=2), whereas in 4 patients with idiopathic dilatation of the ascending aorta, a supracoronary graft was implanted. In 3 patients presenting with a supravalvar aortic stenosis and Williams-Beuren syndrome, a xenopericardial patch was inserted in 2 and a graft was implanted in one.¶   Overall mortality was 4% (3/96); interestingly there was no mortality following redo-procedures. The following significant complications were observed in neonates following aortic valvotomy: low cardiac output (n=6/30, 20%), av block III (1/30, 3%), renal failure requiring peritoneal dialysis (4/30, 16%). Predictive factors for perioperative mortality in this group were: age 〈1 month, emergency operation and duration of the procedure; in the multivariate analysis, only age 〈1 month was found to be predictive for operative mortality. Predictive factors for redo-surgery after previous valvotomy were: age at initial operation below 6 months, biscuspid aortic valve and duration of the follow-up.¶   The spectrum of congenital lesions of the left ventricular outflow tract, aortic valve and ascending aorta is broad and the majority of the surgical procedures can be performed with a reasonably low risk, even if redo- or re-redo surgery has to be performed. Only neonates requiring emergency aortic valvotomy have an increased perioperative risk.
    Notes: Zusammenfassung Objektiv. Untersuchung sämtlicher Eingriffe an der linksventrikulären Ausflussbahn (LVOT), Aortenklappe (AK) und Aorta ascendens (AoA) und Bestimmung von prädiktiven Faktoren für perioperative Mortalität und Reoperation.¶Patienten und Methode. Zwischen 1984 und 1999 wurden 96 Patienten mit einem solchen angeborenen Leiden operativ behandelt: es handelte sich bei 68 Patienten um einen Ersteingriff, bei 22 um eine Reoperation und bei 6 um eine Re-Reoperation. Eine primäre isolierte Kommissurotomie der AK wurde bei 30 Patienten durchgeführt, währenddem eine Kommissurotomie mit Rekonstruktion der AK bei 6 Patienten stattfand. Folgende 28 Reoperationen wurden durchgeführt: Re-Kommissurotomie mit plastischer Rekonstruktion (n=8, alle Klappen trikuspid), Ersatz mit Homograft (n=8), mit mechanischer (n=3) oder mit biologischer (n=3) Prothese. Bei der Re-Reoperation wurde bei 4 Patienten eine mechanische Prothese (2 davon mit simultaner Erweiterung des Aortenanulus) und bei 2 Patienten einen Homograft eingepflanzt.¶   Bei 18 Patienten wurde eine Subaortenstenose (membranös 10, muskulär 5) reseziert und bei 3 Patienten wurde eine Erweiterungsoperation des LVOT durchgeführt.¶   Folgende Eingriffe (n=14) an der Aorta ascendens wurden durchgeführt: Rekonstruktion der Aortenwurzel unter Erhaltung der nativen Klappe (n=5), Aortenwurzelersatz mit Composite-Graft (n=4) und mit Homograft (n=2) bei Marfan Syndrom und suprakoronarer Ascendensersatz (n=4) wegen idiopathischer Aortendilatation. Bei 3 Patienten wurde die Resektion einer supravalvulären Stenose mit Ersatz (n=1) oder konsekutiver Erweiterung mit Patch (n=2) bei idiopathischer Stenose oder im Rahmen eines Williams-Beuren Syndroms durchgeführt.¶   Bei 28 Patienten wurden zusätzliche kardiale (n=19) oder extrakardiale (n=11) Missbildungen diagnostiziert.¶Resultate. Die Frühmortalität betrug 3/96 (4%); es gab keine Mortalität im Rahmen eines zweiten oder dritten Eingriffes. Folgende signifikante postoperative Komplikationen wurden nach Valvulotomie (n=30) beobachtet: Herzinsuffizienz nach neonataler Valvulotomie (20%), av-Block III. Grades (3,3%), Peritonealdialyse-pflichtige Niereninsuffizienz (16%). Risikofaktoren für die perioperative Mortalität beim ersten Eingriff waren: Alter〈1 Monate, Notfalloperation und Dauer des Eingriffes (univariabel). Die folgenden Prädiktoren konnten für eine Reoperation nach Komissurotomie identifiziert werden: Alter bei der ersten Operation 〈6 Monate, bikuspide Klappe, Länge des Beobachtungsintervall.¶Schlussfolgerung. Das Spektrum angeborener Missbildungen im Bereich des LVOT, der AK und der AoA und die Auswahl des chirurgischen Verfahren sind vielfältig. Sämtliche Eingriffe (inkl. Re- und Re-Reoperation) können heutzutage mit Ausnahme der notfallmäßigen Kommissurotomie bei Neugeborenen (mit kritischer Aortenstenose) mit einem geringen Risiko durchgeführt werden, insofern keine weitere schwerwiegende kardiale Missbildungen vorhanden sind.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 157 (1998), S. 618-621 
    ISSN: 1432-1076
    Keywords: Key words Amlodipine ; Calcium channel blockers ; Childhood ; Cyclosporine ; Hypertension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The calcium channel blocker nifedipine is widely used in children with systemic hypertension; however, because of the short duration of action, three to four daily doses of the standard preparation are required. Amlodipine once-daily, a calcium channel blocker structurally related to nifedipine with an excellent bioavailability and a long elimination half-time, has been shown to reduce blood pressure in adults. No information is available on the use of amlodipine in childhood. The effects of amlodipine once-daily (5 to 10 mg) were therefore assessed in 28 paediatric patients with hypertension. Amlodipine was withdrawn in five patients who experienced oedema and flushing. In the remaining 23 patients blood pressure was significantly reduced 3 weeks after amlodipine (on average by 7/5 mm Hg) and further decreased at 12 weeks (by 21/12 mm Hg). Heart rate and body weight were unchanged. In eight patients concomitantly treated with cyclosporine, the blood level of this agent was stable throughout the study, thus not requiring any dose adjustment. Conclusion The study illustrates the antihypertensive properties of amlodipine once-daily in paediatric hypertension. Amlodipine appears particularly indicated in patients concomitantly treated with cyclosporine.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric cardiology 18 (1997), S. 28-34 
    ISSN: 1432-1971
    Keywords: Key words: Sotalol — Electrophysiology — Pharmacokinetics — Side effects — Proarrhythmia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Sotalol is a noncardioselective β-blocking agent with additional class III antiarrhythmic properties (action potential duration prolongation). These combined electrophysiologic effects make it a valuable drug for treating various arrhythmias. Its effectiveness for suppressing supraventricular reentrant tachycardias in children is well documented. Atrial flutter in children can be effectively managed in a high percentage of those treated. Ventricular arrhythmias in children can be adequately controlled by the administration of oral sotalol. Side effects are those typically seen during the course of treatment with a β-blocker and lead to discontinuation of the drug in 3–6% of children. Proarrhythmia is another concern after sotalol administration. Increased ventricular ectopy, impairment of atrioventricular conduction, and suppression of sinus node activity with exacerbation of bradycardia (especially in children with sinus node dysfunction) may be found in a considerable number of treated patients, usually within a few days of sotalol initiation. Sotalol is an effective antiarrhythmic drug, but its potential side effects warrant inpatient treatment initially and close electrocardiographic monitoring.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric cardiology 18 (1997), S. 118 -126 
    ISSN: 1432-1971
    Keywords: Key words: Adenosine — Infants — Children — Paroxysmal supraventricular tachycardia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Adenosine is an effective, safe drug for the diagnosis and treatment of paroxysmal tachycardias in adult and pediatric patients. A starting dose of 0.05–0.10 mg/kg as a rapid bolus injection is recommended for infants and children. An electrophysiologic effect can be expected within 20 seconds after injection. Dosage may be increased up to 0.3 mg/kg in steps of 0.05–0.10 mg/kg or until conversion to sinus rhythm is reached. Due to its basic electrophysiologic properties of slowing conduction in the atrioventricular (AV) node, which may result in transient AV block, adenosine is almost always effective in terminating supraventricular tachycardias in which the AV node forms a critical part of the reentrant circuit (i.e., AV nodal reentrant tachycardia and AV reciprocating tachycardia). Based on its properties, adenosine is also advocated as a useful diagnostic tool for unmasking primary atrial tachycardias by inducing transient high grade AV block. Advantages over other antiarrhythmic agents include the agent's short half-life (〈2 seconds) and minimal or no negative influence on blood pressure. Because of its short half-life, however, early recurrence of the tachycardia is observed in up to one-third of patients treated. Based on rare but serious unwanted side effects, patients with known or suspected irritable airways and sinus node dysfunction and those who have undergone orthotopic cardiac transplantation should probably not be given adenosine. Adenosine may be recommended as the drug of choice for treatment of paroxysmal tachycardia in young patients. Primary success rates range between 85% and 100% of all the tachycardia episodes treated. Termination of the tachydysrhythmia, however, does not always mean that the underlying dysrhythmia was of supraventricular origin with the AV node as a critical part of the tachycardia mechanism. Rare but possible life-threatening side effects (prolonged sinus arrest and complete AV block, atrial fibrillation, acceleration of ventricular tachycardia, apnea) necessitate proper monitoring of the patients.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 154 (1995), S. 513-517 
    ISSN: 1432-1076
    Keywords: Key words Beta-blocking agents ; Children ; Infants ; Ventricular ; tachycardia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Ventricular tachycardia without underlying heart disease is rare in infancy and childhood. Four young children (median age 8 months at initial presentation) with frequently recurrent episodes of asymptomatic and self-limiting ventricular tachycardia are reported. By noninvasive investigation no apparent heart disease has been found in all patients. Initially three of the four children had been treated with an anti-arrhythmic drug. Treatment was soon stopped in two patients for lack of symptoms and for lack of efficacy of therapy; one patient remained on beta-blocker therapy. One child did not receive anti-arrhythmic therapy. After a mean follow up of 32 months all patients continued to be asymptomatic despite frequently recurrent episodes of self-limiting ventricular tachycardia. Conclusion Ventricular tachycardia in asymptomatic children with an otherwise normal heart carries a good prognosis. Invasive investigation (cardiac catheterization with electrophysiological study and right ventricular biopsy) can be withhold, as long as there are no symptoms. For lack of efficiency of anti-arrhythmic drugs in suppressing ventricular tachycardia in asymptomatic children with apparently normal hearts, these patients may be left without therapy but have to be followed closely.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 157 (1998), S. 101-106 
    ISSN: 1432-1076
    Keywords: Key words Digoxin ; Infants ; Supraventricular tachycardia ; Wolff-Parkinson-White-syndrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Re-entrant supraventricular tachycardia is the most common cardiac arrhythmia in infancy. Pharmacological prevention of recurrencies is a standard recommendation for infants less than 1 year of age. In view of the often benign spontaneous clinical course of the disease, the risk-benefit analysis of any antiarrhythmic agent given is important. It was the aim of this retrospective study, to assess the value of oral long-term digoxin given to paediatric patients with supraventricular tachycardia with onset in the first 4 months of life. Twenty-six newborns and infants fulfilled the inclusion criteria. Median age at first presentation of the patients was 7 days. Eight patients (31%) had structural heart disease, 9 patients had a pre-excitation syndrome, and the other 17 children had a concealed accessory atrioventricular pathway. Long-term prophylaxis with oral digoxin was considered successful in 17 children (65%). In 2 patients therapy with digoxin was considered partially effective and in 7 patients (27%) failure of digoxin to improve symptoms led to the introduction of other anti-arrhythmic agents. Serum digoxin levels were no different in the patients with successful therapy as compared to those with treatment failure. No side-effects due to digoxin were noted in all the patients treated. After a mean followup of 54 months (12–130 months), 19 children (73%) were free of recurrencies and on no medication, 5 children were free of recurrencies but had anti-arrhythmic therapy. Only 2 patients, both on anti-arrhythmic therapy, were still suffering from tachycardia. Conclusion Digoxin remains an effective treatment option in infants with supraventricular tachycardia and it helped to avoid the long-term use of other anti-arrhythmic drugs with potentially more serious side-effects (pro-arrhythmia) in a considerable proportion of infants treated.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 155 (1996), S. 637-639 
    ISSN: 1432-1076
    Keywords: Cardiac myxoma ; Childhood
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 10-year-old boy presented with unspecific symptoms and laboratory abnormalities simulating a chronic recurrent inflammatory disorder. Cardiovascular symptoms were absent. After 2 years of intermittent symptoms and persisting laboratory signs of an inflammatory disorder, echocardiographic evaluation revealed a large left atrial tumour. Immediate surgical excision confirmed the diagnosis of a cardiac myxoma and resulted in freedom from symptoms and normalization of laboratory parameters.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 154 (1995), S. 513-517 
    ISSN: 1432-1076
    Keywords: Beta-blocking agents ; Children ; Infants ; Ventricular tachycardia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Abstract Ventricular tachycardia without underlying heart disease is rare in infancy and childhood. Four young children (median age 8 months at initial presentation) with frequently recurrent episodes of asymptomatic and self-limiting ventricular tachycardia are reported. By noninvasive investigation no apparent heart disease has been found in all patients. Initially three of the four children had been treated with an anti-arrhythmic drug. Treatment was soon stopped in two patients for lack of symptoms and for lack of efficacy of therapy; one patient remained on beta-blocker therapy. One child did not receive anti-arrhythmic therapy. After a mean follow up of 32 months all patients continued to be asymptomatic despite frequently recurrent episodes of self-limiting ventricular tachycardia. Conclusion Ventricular tachycardia in asymptomatic children with an otherwise normal heart carries a good prognosis. Invasive investigation (cardiac catheterization with electrophysiological study and right ventricular biopsy) can be with-hold, as long as there are no symptoms. For lack of efficiency of antiarrhythmic drugs in suppressing ventricular tachycardia in asymptomatic children with apparently normal hearts, these patients may be left without therapy but have to be followed closely.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 155 (1996), S. 637-639 
    ISSN: 1432-1076
    Keywords: Key words Cardiac myxoma ; Childhood
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 10-year-old boy presented with unspecific symptoms and laboratory abnormalities simulating a chronic recurrent inflammatory disorder. Cardiovascular symptoms were absent. After 2 years of intermittent symptoms and persisting laboratory signs of an inflammatory disorder, echocardiographic evaluation revealed a large left atrial tumour. Immediate surgical excision confirmed the diagnosis of a cardiac myxoma and resulted in freedom from symptoms and normalization of laboratory parameters. Conclusion A cardiac myxoma can present with unspecific and extracardiac symptoms. It should be considered in the differential diagnosis of unclear chronic inflammatory or chronically recurrent febrile illness suggesting an auto-immune vasculitis or collagen disorder.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of inherited metabolic disease 17 (1994), S. 60-66 
    ISSN: 1573-2665
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We report a 7-year-old patient with chondrodysplasia punctata but without rhizomelia. He was born with typical clinical and radiological symptoms of this disease. He developed slowly with considerable psychomotor retardation but improved later, gaining some speech and psychosocial contacts. Joint contractures and bilateral cataracts are still major problems.De novo plasmalogen synthesis in fibroblasts was greatly reduced and DHAP-AT activity was at the lower limit of controls. Peroxisomal thiolase was present in its precursor form only. Membrane fluidity (measured by TMA-DPH fluorescence anisotropy) was increased in erythrocyte ghosts and in lymphocytes. Plasma phytanic acid concentration was elevated 5-fold. The patient represents a mild clinical course of chondrodysplasia punctata, resembling Conradi-Hünermann syndrome, but biochemically he has the typical peroxisomal dysfunction of rhizomelic chondrodysplasia punctata except for a high residual activity of DHAP-AT.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...