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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cardiac surgery 6 (1991), S. 0 
    ISSN: 1540-8191
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract Surgical repair of a distal aortic arch aneurysm in a 5-year-old boy with coarctation is presented. No synthetic material was incorporated thus allowing future growth of the anastomosis.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Monatsschrift Kinderheilkunde 145 (1997), S. 1307-1311 
    ISSN: 1433-0474
    Keywords: Schlüsselwörter Marfan-Syndrom ; Echokardiographie ; Aortenektasie ; Mitralklappenrolaps ; β-Blocker-Therapie ; Key words Marfan’s syndrome ; Infancy ; Echocardiography ; Mitral valve prolaps ; Aortic ectasia ; β-blockers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Background: Cardiovascular involvement is frequent in Marfan’s syndrome and crucial for the prognosis in many cases. The aim of this study was to determine the frequency and severity of cardiovascular disorders in children and adolescents with Marfan’s Syndrome. Methods: Echocardiographic and colour doppler flow studies were performed in 44 patients with a mean age of 9,2 years (0,2–19,2). In addition to the standard M-mode measurements, the aortic diameter was determined at four discrete points (aortic valve anulus, aortic sinus, aorta ascendens, aortic arch) by two-dimensional echocardiography. The data were compared with the literature, and a control group of 80 healthy children with a mean age of 9,4 years (0,1–19,2). Results: 86% of the patients showed at least one pathologic echocardiographic abnormality: Aortic root ectasia was found in 84%, and mitral valve prolaps in 59%. Colour flow doppler detected mitral regurgitation in 25%. 7% of the patients showed aortic insufficiency, and 7% had tricuspid valve involvement. In patients with the Marfan syndrome left atrial diameter corrected for body surface area was significantly greater with 2,22±0,72 cm/m2 than in the control group with 1,15±0,38 cm/m2. Left ventricular enddiastolic diameter and fractional shortening showed no difference between the two groups. Conclusions: Even in childhood and adolescence severe cardiovascular changes can be found in Marfan’s syndrome. These patients should be regarded as a risk population needing close cardiologic follow-up. If aortic ectasia is detected a prophylactic medication with β-blockers is recommended.
    Notes: Zusammenfassung Hintergrund: Kardiovaskuläre Veränderungen stellen eine häufige Komplikation des Marfan-Syndroms dar und entscheiden in vielen Fällen über den Verlauf und die Prognose. Das Ziel der vorliegenden Untersuchung war, die Häufigkeit und Schwere kardiovaskulärer Veränderungen im Rahmen des Syndroms bei Kindern und Jugendlichen zu ermitteln. Methode: 44 Patienten in einem mittleren Alter von 9,2 Jahren (0,2–19,2 Jahre) wurden einer ausführlichen echokardiographischen und farbdopplersonographischen Untersuchung unterzogen. Der Aortendurchmesser wurde zusätzlich an 4 Meßpunkten im zweidimensionalen Echokardiogramm bestimmt. Als Vergleich dienten Referenzwerte aus der Literatur sowie 80 herzgesunde Kinder in einem mittleren Alter von 9,4 Jahren (0,1–19,2 Jahre). Ergebnisse: Bei 86% der Patienten fand sich mindestens ein pathologischer echokardiographischer Befund. Bei 84% bestand eine Ektasie der Aorta ascendens, überwiegend im Bereich der Aortenwurzel. Bei 59% konnte ein Mitralklappenprolaps nachgewiesen werden. In 25% der Fälle lag eine Mitralinsuffizienz vor. Eine Aorteninsuffizienz sowie Veränderungen an der Trikuspidalklappe bestanden in jeweils 7%. Bezogen auf die Körperoberfläche war der Durchmesser des linken Vorhofs bei den Patienten mit 2,22±0,72 cm/m2 gegenüber den Gesunden mit 1,15±0,38 cm/m2 signifikant erhöht, wogegen sich kein Unterschied im enddiastolischen Durchmesser sowie der Pumpleistung des linen Ventrikels zeigte. Schlußfolgerungen: Patienten mit Marfan-Syndrom weisen schon im Kindes- und Jugendlichenalter in einem erheblichen Ausmaß kardiovaskuläre Veränderungen auf. Sie sind als Risikopatienten zu betrachten und bedürfen regelmäßiger kardiologischer Verlaufskontrollen. Im Fall einer Aortenektasie sollte eine β-Blocker-Therapie eingeleitet werden.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1238
    Keywords: Key words Left atrial thrombus ; Cardiac surgery ; Infant ; Recombinant tissue-type plasminogen activator ; Hemopericardium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 10-month-old boy with major left atrial thrombus following cardiac surgery was treated with intravenously administered recombinant tissue-type plasminogen activator (rt-PA; Actilyse, Thomae-Behring, Germany). The left atrial thrombus was diagnosed by Doppler echocardiography 8 days after complete correction of a ventricular septal defect. rt-PA therapy was administered over a 10-day period. Significant hemopericardium occurred 50 h after the start of thrombolytic therapy. rt-PA infusion was discontinued for 20 h to insert a pericardial drainage. The initial rt-PA dose was 0.1 mg/kg over 10 min followed by a continuous daily infusion of 1.7 mg/kg together with low-dose heparin. Thrombolytic therapy was restarted 20 h after pericardial drainage was inserted. The daily rt-PA dose was gradually raised to 3 mg/kg (total dose: 18 mg/kg). On day 7 and 8 a clear decrease in P-plasminogen and P-antithrombin occurred, requiring additional fresh frozen plasma and P-antithrombin concentrate substitution. One day later, without further side effects, complete thrombolysis occurred. Although hemopericardium demanded discontinuation of thrombolytic therapy, rt-PA administration, closely monitored by Doppler echocardiography, was continued, leading to complete thrombolysis of the left atrial thrombus in the early postoperative period. We consider the literature dealing with rt-PA thrombolysis in infancy we discuss this case report.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1238
    Keywords: Left atrial thrombus ; Cardiac surgery ; Infant ; Recombinant tissue-type plasminogen activator ; Hemopericardium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 10-month-old boy with major left atrial thrombus following cardiac surgery was treated with intravenously administered recombinant tissue-type plasminogen activator (rt-PA; Actilyse, Thomae-Behring, Germany). The left atrial thrombus was diagnosed by Doppler echocardiography 8 days after completecorrection of a ventricular septal defect. rt-PA therapy was administered over a 10-day period. Significant hemopericardium occurred 50 h after the start of thrombolytic therapy. rt-PA infusion was discontinued for 20 h to insert a pericardial drainage. The initial rt-PA dose was 0.1 mg/kg over 10 min followed by a continuous daily infusion of 1.7 mg/kg together with low-dose heparin. Thrombolytic therapy was restarted 20 h after pericardial drainage was inserted. The daily rt-PA dose was gradually raised to 3 mg/kg (total dose: 18 mg/kg). On day 7 and 8 a clear decrease in P-plasminogen and P-antithrombin occurred, requiring additional fresh frozen plasma and P-antithrombin concentrate substitution. One day later, without furtherside side effects, complete thrombolysis occurred. Although hemopericardium demanded discontinuation of thrombolytic therapy, rt-PA administration, closely monitored by Doppler echocardiography, was continued, leading to complete thrombolysis of the left atrial thrombus in the early postoperative period. We consider the literature dealing with rt-PA thrombolysis in infancy we discuss this case report.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-2277
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Experimental mechanics 12 (1972), S. 345-351 
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The design, fabrication, development, operation, calibration and results from reversed bending combined with steady-torque fatigue-research machines are presented. Fifteen-centimeter-long, notched, SAE 4340 steel specimens are subjected to various combinations of these stresses and cycled to failure. Failure occurs when the crack in the notch passes through the specimen automatically shutting down the test machine. These cycles-to-failure data are statistically analyzed to develop a probabilistic S-N diagram. These diagrams have many uses including the design of rotating components having minimum size and weight for a specified number of cycles and reliability.
    Type of Medium: Electronic Resource
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