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
    s.l. : American Chemical Society
    Analytical chemistry 44 (1972), S. 1098-1099 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    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
    Journal of molecular medicine 64 (1986), S. 76-85 
    ISSN: 1432-1440
    Keywords: Pulsed Doppler Echocardiography ; Flow Velocity ; Aortic and Mitral Valve Replacement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In 94 subjects with normally functioning heart valve prostheses (51 aortic and 43 mitral valve prostheses) and in 35 patients with intact aortic and mitral valves, blood flow velocity within the heart and the aortic root have been recorded using pulsed Doppler velocity studies in patients with diseased valves of the left heart. In addition, a further 7 patients were investigated using invasive catheter tip velocitometry, pre- and postoperatively. The preversus postoperative changes of maximum velocity and acceleration is characterized as follows: postoperative flow velocity tracings show approximately normal profiles comparable to normal valve function. Turbulence formation is diminished and the steep uptroke of the normal flow pattern is restituted. Differencies in transprosthetic blood flow patterns dependent on the implanted prosthesis model can be defined. Bioprostheses, in particular the Carpentier-Edwards device, reliably approximate normal amplitude-time characteristics. This is also true for the St. Jude Medical prosthesis with central flow properties. Velocitometric signs of valve dysfunction were detected in 9 patients: sensitivity was 100%; specificity ranged from 76% in aortic to 96% in mitral prostheses. Pulsed Doppler echocardiography therefore is a useful complement in the non-invasive haemodynamic tools and can be repeatedly applied to a patient with prosthetic cardiac valve replacement.
    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
    Journal of molecular medicine 62 (1984), S. 533-542 
    ISSN: 1432-1440
    Keywords: Pulsed Doppler echocardiography ; Catheter velocitometry ; Echocardiography ; Aortic valve disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The diagnostic value of pulsed Doppler echocardiography (PDE) had not been sufficiently assessed up until now. Invasive catheter velocitometric measurements in the central vessels give quantitative information on the blood movement across the aortic and pulmonary valves. It is particularly useful in the quantification of aortic regurgitation. We successfully investigated 52 patients by means of PDE (ATL 500 A); 20 were suffering pure aortic incompetence, 11 pure stenosis and 21 had combined stenosis and regurgitation. Fifteen patients without aortic valvular disease served as controls. Our findings were compared with the results of cardiac catheterization and angiography in each case. In addition, 14 patients with aortic regurgitation were studied invasively by catheter velocitometry. The obtained regurgitation values were compared to the PDE method. In the PDE the underlying criteria for the assessment of the recordings were as follows: formal analysis of the analog signal and of the turbulence content during systole and diastole; in the flow velocity tracings aortic incompetence showed a steep increase with high peak to peak aortic velocities and scant turbulence formation; the reverse flow during regurgitation was accompanied by a high grade turbulent velocity pattern. The area under the diastolic (regurgitant) flow velocity curve (the time-amplitude integral) corresponded significantly with the angiographic severity of aortic insufficiency (r=0.87). In aortic stenosis, turbulence formation leads to an approximately flat velocity profile across the ascending aorta, if the region in the vicinity of the valve is omitted. The flow velocity analog signals are considerably disturbed. However, the turbulence content which can be qualitatively estimated from the recordings, correlates well with the calculated valve area. In combined aortic valve stenosis and incompetence, the prevailing turbulent pattern does not always permit one to assess sufficiently the severity of the stenotic component, whereas the grade of incompetence can be, in general, evaluated. PDE complements the existing non-invasive techniques and probably essentially enriches non-invasive diagnostics.
    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
    Journal of molecular medicine 49 (1971), S. 193-198 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 35 Patienten mit Hypertonie und bei 20 gleichaltrigen Kontrollpersonen wurden die herzdynamischen Zeitmaße und die Kreislaufzeiten bestimmt. Sämtliche herzdynamischen Zeitmaße und die Lungen-Ohr-Zeit waren bei Hypertonikern im Vergleich zur Kontrollgruppe signifikant verlängert. Die Verlängerung der Zeitmaße mit zunehmendem arteriellem Druck wurde besonders deutlich bei Unterteilung der Hypertoniker in 2 Gruppen verschiedenen Schweregrades. Die Veränderungen waren in der Gruppe mit der ausgeprägtesten Hypertonie am deutlichsten. Die Verlängerungen der Zeitmaße erreichten in keinem Fall die bei Herzinsuffizienz beobachteten Werte. Die Beziehung zwischen arteriellem Druck und herzdynamischen Zeitmaßen konnte nur in der Gruppe mit ausgeprägter Hypertonie signifikant bestimmt werden. DieKreislaufzeiten lagen bei den Hypertonikern im Normbereich, waren jedoch gegenüber der Kontrollgruppe verlängert. Die prophylaktische Digitalisierung bei älteren Patienten mit fixierter Hypertonie muß aufgrund der Untersuchungsbefunde diskutiert werden.
    Notes: Summary The systolic time intervals and the circulation times were measured in 35 patients with arterial hypertension and in 20 controls. The time intervals as well as the lung-to-ear time were significantly prolonged in hypertensive subjects as compared to the controls. The difference became more marked with increasing severity of the pressure load. In no patients were the alterations as pronounced as in those with myocardial insufficiency. The correlation between arterial pressure and systolic time intervals was significant in the group of the severely hypertensive patients only. The circulation times were within normal limits in hypertensive patients. They were, however, prolonged in comparison with those of the control group. — The results justify envisaging prophylactic digitalization in older patients with fixed arterial hypertension.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1432-1440
    Keywords: Magnesium ; myocardial insufficiency ; glycosides ; furosemid ; Magnesium ; Myokardinsuffizienz ; Glykoside ; Furosemid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 1. Bei 10 Kontrollpersonen und bei 19 Patienten mit myokardialer Insuffizienz wurde das Serum-Magnesium bestimmt. Bei 2 der kardial dekompensierten Patienten wurden zusätzlich über mehrere Tage die Serumspiegel und die renale Ausscheidung von Magnesium und Kalium bestimmt. 2. Die Ausgangswerte des Serum-Magnesiums für die Kontrollpersonen und die schon mit Glykosiden und Diuretika behandelten Myokardinsuffizienzen unterschieden sich nicht signifikant, während der Unterschied zwischen der Kontroll-gruppe und den unbchandelten Patienten signifikant ausfiel. 3. Patienten mit myokardialer Insuffizienz wiesen unter der Therapie mit Glykosiden und Diuretika (Furosemid) eine Zunahme bzw. Normalisierung des Serum-Magnesiums auf. Die dafür verantwortlichen Mechanismen werden diskutiert. 4. Eine prophylaktische Gabe von Magnesium bei der Behandlung der myokardialen Insuffizienz mit Glykosiden und Diuretika erscheint auch bei einem niedrigen Serum-Magnesium-Spiegel nicht notwendig.
    Notes: Summary 1. Serum magnesium was measured in 10 controls and 19 patients with myocardial insufficiency. In two patients with myocardial insufficiency the blood levels and urinary excretion of both magnesium and potassium were determined every day for a period of one week. 2. No difference was observed between the values of the control group and those of the treated patients. The difference was however significant between the controls and patients with myocardial insufficiency not on cardiac treatment. 3. Patients with myocardial insufficiency exhibited a rise of serum magnesium while treated with glycosides and furosemid. The mechanisms responsible for this are discussed. 4. The present results suggest that there is no need for prophylactic application of magnesium in patients with myocardial insufficiency treated with glycosides and furosemid.
    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
    Journal of molecular medicine 50 (1972), S. 360-363 
    ISSN: 1432-1440
    Keywords: Blood flow distribution ; computer scintigraphy ; chronic obstructive airways disease ; pulmonary hypertension ; Durchblutungsverteilung ; Computerszintigraphie ; Chronisch obstruktive Atemwegserkrankung ; Pulmonale Hypertonie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 19 Patienten mit obstruktivem Syndrom wurde mit Hilfe der Computerszintigraphie die Verteilung der Lungendurchblutung in den Lungenober- und Lungenunterfeldern bestimmt. Es zeigte sich, daß in signifikanter Korrelation mit zunehmendem Druck in der A. pulmonalis die Oberfclder vermehrt durchblutet werden. Eine Ausnahme bildeten Patienten mit ausgedehnten emphysematösen oder restriktiven Veränderungen. Die Computerszintigraphie bietet die Möglichkeit, durch ein den Patienten nicht belastendes Verfahren, wichtige Hinweise für das Vorliegen einer pulmonalen Hypertonie zu gewinnen.
    Notes: Summary The distribution of blood flow in the lungs was determined in 19 patients with chronic obstructive airways disease. It could be shown that the upper parts of the lungs tend to be more perfused with increasing pulmonary artery pressure. Exceptions are patients with massive emphysematous or restrictive alterations of lung parenchyma in the upper zones of the lungs. The computer scintigraphy provides with information concerning the presence or absence of pulmonary hypertension without great stress to the patient.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1432-1440
    Keywords: Chronic obstructive airways disease ; Blood gases ; Lung mechanic ; Age ; Pulmonary artery pressure ; Biometric analysis ; Chronisch obstruktive Ventilationsstörungen ; Blutgaspartialdrucke ; Atemmechanik ; Alter ; Pulmonalarteriendruck ; Biometrische Analyse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 1. Daten von 43 Patienten und 11 Variablen lagen zur biometrischen Analyse von 9 Kenngrößen der Atemfunktionsdiagnostik und des Lebensalters hinsichtlich ihrer — voneinander unabhängigen — Wirkung auf den Mitteldruck der A. pulmonalis vor. 2. Der Pulmonalisdruck beim obstruktiven Syndrom kann zu etwa 52% allein aus den arteriellen Partialdruckwerten für Sauerstoff und Kohlensäure vorausgesagt werden. 3. Weitere 8% des Pulmonalisdruckes werden durch das Lebensalter der Patienten erklärt. Der Beitrag des Residualvolumens liegt bei 5%. 4. Andere Größen als die bei diesem Krankengut gemessenen tragen zu 35% zum Pulmonalisdruck bei. 5. Die Anwendung eines anderen statistischen Models bei einem größeren Patientenkollektiv führt möglicherweise zu einer genaueren Information über den Zusammenhang zwischen Lungenfunktion und Pulmonalarterienmitteldruck.
    Notes: Summary 1. The lung function data, the age and the mean pulmonary artery pressure of 43 patients with chronic obstructive airways disease were examined by multifactorial analysis. The purpose of the study was to find out which of nine lung function variables determine preferentially the mean pulmonary artery pressure. 2. 52% of the mean pulmonary artery pressure in chronic obstructive airways disease can be predicted by the blood gases. 3. A further 8% can be explained by the age of the patient. The residual volume contributes 5%. 4. The analysis shows that 35% of the elevated mean pulmonary artery pressure cannot be accounted for by the conventional lung function data. 5. Another statistical model has to be investigated to obtain better information on the interrelationship between lung function data and mean pulmonary artery pressure.
    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
    Journal of molecular medicine 51 (1973), S. 1129-1142 
    ISSN: 1432-1440
    Keywords: Marfan's syndrome ; “Billowing Valve”-Syndrome ; “Floppy-Valve”-Syndrome ; Aneurysms of the sinuses of Valsalva ; Medianecrosis ; Marfan-Syndrom ; Billowing Valve-Syndrom ; Floppy Valve-Syndrom ; Sinus-Valsalvae-Aneurysma ; Medianekrose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird eine Übersicht über die im älteren und rezenten Schrifttum mitgeteilten kardiovasculären Symptome bei Marfan S. gegeben. Pathomorphologische und pathophysiologische Veränderungen sowie die klinischen Erscheinungsformen werden detailliert abgehandelt. Im älteren Schrifttum (bis etwa 1960) mitgeteilte verschiedenartige kardiovasculäre Befunde werden kritisch revidiert. Die Beziehungen von klinischen und pathomorphologischen Untersuchungsergebnissen werden herausgestellt. Über die bei Marfan S. charakteristischen histologischen Veränderungen der Aortenwand mit Dilatation der Aorta thoracica ascendens und Entwicklung von Sinus Valsalvae-Aneurysmen mit oder ohne begleitende Aortenklappenin-suffizienz wird ausführlich berichtet. Dabei werden pathomorphologische, klinische und differentialdiagnostische Aspekte im Kindes-, Jugend- und Erwachsenenalter sowie in der Gravidität erörtert. Auf Komplikationen bei Sinus Valsalvae-Aneurysmen wird hingewiesen. Als weitere charakteristische Manifestation bei Marfan S. sind besondere Formen von Klappenveränderungen durch moderne Untersuchungsmethoden für Herz- und Gefäßkrankheiten erkannt und symptomatologisch abgegrenzt worden. Am häufigsten ist die Valvula mitralis durch „myxomatöse Transformation“ verändert. Die charakteristische Symptomatologie dieser progredienten Mitralklappenveränderung bei Marfan S. manifestiert sich durch ein „Billowing Valve“-bzw. ein „Floppy Valve“-Syndrom; diese Klappensyndrome werden speziell beschrieben und pathomorphologische Befunde in Beziehung zu pathophysiologischen und hämodynamischen Vorgängen erörtert. Das auskultatorische Leitsymptom eines mesosystolischen Klick ohne oder mit einem spätsystolischen Geräusch wird für die Frühdiagnose kardiovasculärer Veränderungen bei Marfan S. als wesentlich hervorgehoben. Ferner wird über angiokardiographische und elektrokardiographische Untersuchungsergebnisse berichtet. Typische Befunde eines Patienten mit Marfan S. sind beigefügt. Die Ergebnisse genealogischer Untersuchungen über verschiedene kardiovasculäre Manifestationen und “formes frustes“ mit solitären Befunden an der Aorta (Dilatation und Aneurysmen) und an der Mitralklappe („Billowing Valve“-bzw. „Floppy Valve“-Syndrom) werden hinsichtlich ihrer Bedeutung für die frühe Erkennung, Verlauf und Prognose des Marfan S. dargestellt. Der Wert moderner angiographischer und hämodynamischer Untersuchungsmethoden für die frühe Diagnose und exakte Abgrenzung der typischen Symptomatologie kardiovasculärer Erscheinungsformen des Marfan S. wird hervorgehoben. Auf prophylaktische und therapeutische Maßnahmen wird kurz hingewiesen.
    Notes: Summary A review of the past and recent literature on Marfan's syndrome is presented with special reference to the different forms of cardiovascular pathological and clinical features of the disease. The findings formerly published are critically revised. The relation between clinical and pathomorphological examinations are pointed out. The typical dilatation of the aortic root and the consecutive development of Sinus Valsalvae aneurysms with or without valvular insufficiency are described in detail. The peculiar aspects of pathomorphological and clinical manifestations with additional comments on the differential diagnosis in children, adolescents and adults are discussed. Observations of accelerated development of changes in aortic aneurysms in pregnancy are presented. A further section of the review deals with the typical changes of the valvular tissue in Marfan's syndrome. Most often, the mitral valve seems to be affected by the process of “myxomatous transformation”. The knowledge of these valvular lesions was considerably promoted by the more sophisticated techniques applied in cardiology and radiology since 1960. The characteristic symptomatology of the valvular changes of the mitral valve is manifested by the “billowing” and the “floppy” valve syndrome, respectively. The pathomorphological changes in the “billowing” and “floppy” valve syndromes are correlated with the pathophysiological and especially the haemodynamic features. The significance of a meso-systolic click combined with or without a late systolic murmur is emphasized as a leading symptom in the early diagnosis of Marfan's syndrome. The elective angiographic and haemodynamic findings and the more or less typical electrocardiographic patterns are discussed and illustrated by a paradigmatic case. The so-called “formes frustes” recognized preferably by genealogical investigations show isolated manifestations, e.g. aortic dilatation or mitral involvement, and are often significant in the early diagnosis, course and prognosis of Marfan's syndrome. The diagnostic and prognostic values of modern haemodynamic techniques and angiographic methods is underscored. Therapeutic and prognostic aspects are discussed in brief.
    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
    Human genetics 〈Berlin〉 96 (1995), S. 102-104 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The WT1 gene is normally expressed during gonadal development and specific mutations in heterozygous form cause Drash syndrome, characterized by male pseudohermaphroditism and gonadal dysgenesis, renal failure and a predisposition for Wilms' tumour. These observations prompted us to test whether WT1 mutations are involved in isolated gonadal dysgenesis, being the most severe form of disturbance in gonadal differentiation. We studied 27 cases of 46,XY females with gonadal dysgenesis who had previously been screened for and found not to carry SRY gene mutations. We performed mutational screening of the WT1 gene with denaturing gradient gel electrophoresis. In one of these patients, a heterozygous point mutation in exon 8 was found. This mutation has previously been described in Drash syndrome and re-evaluation of the clinical data confirmed this diagnosis. Based on these results, we conclude that isolated gonadal dysgenesis is not caused by mutations in the WT1 gene.
    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
    European journal of pediatrics 158 (1999), S. 662-667 
    ISSN: 1432-1076
    Keywords: Key words Somatosensory evoked potentials ; Far-field potentials ; Achondroplasia ; Foramen magnum stenosis ; Children
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Children with achondroplasia may have high cervical myelopathy due to stenosis of the cranio-cervical junction resulting in neurological disability and an increased rate of sudden death. To detect myelopathy we recorded somatosensory evoked potentials (SEPs) after median nerve stimulation in 30 patients with achondroplasia aged 13 months to 18 years (mean 6 years). In addition to the conventional technique of recording the cortical N20 and the central conduction time (CCT), we employed a noncephalic reference electrode recording the subcortical waveforms N13b and P13, generated near the cranio-cervical junction. The findings were related to the clinical status and MRI results. Eighteen patients had MRI evidence of spinal cord compression with indentation or narrowing of the upper cervical cord, and 13 showed signs of myelomalacia. Seven patients had neurological abnormalities. The sensitivities of the SEPs were 0.89 for cervical cord compression, 0.92 for myelomalacia and 1.0 for the clinically symptomatic patients. There were no false-positive results. The subcortical SEPs were more sensitive than the conventional recordings. However, the conventional SEPs were highly specific in the most severely affected patients; here the specificity was 1.0 for patients with myelomalacia and 0.96 for symptomatic patients. Postoperative SEPs improved after occipital decompression in two children. Conclusion The analysis of somatosensory evoked potentials, in particular of subcortical tracings, is useful in the detection of early cervical myelopathy in children with achondroplasia. Early neurosurgical decompression may prevent irreversible damage.
    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...