Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
  • 1
    Keywords: Germany ; MODEL ; CT ; PATIENT ; MAGNETIC-RESONANCE ; FUSION ; RADIOFREQUENCY ABLATION ; CHILDREN ; ORIGIN ; GUIDANCE ; ABLATION ; CATHETER ; ARRHYTHMIAS ; GUIDE ABLATION ; MAPPING SYSTEM ; MULTISLICE COMPUTED-TOMOGRAPHY ; NONCONTACT
    Type of Publication: Journal article published
    PubMed ID: 16998745
    Signatur Availability
    BibTip Others were also interested in ...
  • 2
  • 3
    ISSN: 1432-1076
    Keywords: Key words Nitrogen dioxide  ;  Nitric oxide  ;   Inhaled nitric oxide  ;  Pulmonary hypertension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The aim of the present study was to analyse the time response to nitric oxide (NO) dosing changes as well as the formation of nitrogen dioxide (NO2) with different ventilation systems, respirator settings and application sites during NO inhalation. The inspired NO and NO2 concentrations were continuously measured using chemiluminiscence within a dummy ventilatory system equipped with two different respirator systems (Siemens Servo 900c and Bear BP 2001). NO was either introduced into the afferent limb of the ventilatory circuit close to the endotracheal tube (site A) or into the so-called low pressure port of the Servo 900c respirator, far away from the endotracheal tube (site B). In addition, the decay of the inspired NO concentration after cessation of the NO gas flow was studied. This decay was considerably prolonged when NO was introduced at site B (time constants: τ = 7.19 min versus τ = 0.29 min). Within the concentration range studied (0–25 ppm NO) a linear correlation between the NO and NO2 concentration was found. At site A and an inspired oxygen concentration of 〉 0.95 NO2 formation amounts to 1.14% ± 0.11% of the NO concentration. Using this value one can calculate the NO2 formation for a given NO dose. For example, when 40 ppm NO are applied, a concentration of 0.45 ppm NO2 can be expected, which is well below the relevant toxic concentrations. However, when NO was introduced at site B, NO2 formation was significantly increased to 1.61% ± 0.16%. Passage of the ventilated gas through soda lime led only to a slight and insignificant reduction in NO2 concentration. The continuous flow respirator BP 2001 showed a significantly lower NO2 concentration when compared to the non-continuous flow respirator Servo 900c (0.64 ± 0.11% vs.1.14 ± 0.11%). Conclusion The application of NO close to the endotracheal tube is associated with a much faster response of the actual inspired NO concentration to dosing changes and shows the lowest NO2 formation. In order to avoid toxic NO2 concentrations, an upper limit of 40 ppm NO is recommended for continuous NO inhalation.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1433-0474
    Keywords: Schlüsselwörter Linksventrikuläre Tachykardie ; Elektrophysiologische Diagnostik und Therapie ; Key words Leftventricular tachycardia ; Electrophysiological diagnosis and therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary We report about the possibility of electrophysiological diagnosis and therapy in the treatment of a symptomatic left ventricular tachycardia which could not be treated effectively by oral medical therapy in a 10 year old boy with no obvious structural heart disease. By right bundle-bloc-like QRS-complexes in the surface-ECG, the diagnosis of the ventricular origin of the tachycardia was confirmed by transesophageal-ECG. This was followed by the first electrophysiological examination that showed increased leftventricular vulnerability. During this electrophysiological examination the tachycardia was terminated by stimulated singular premature beats. An oral medical therapy with sotalol was started. After the phase of saturation the next ventricular stimulation was done, that showed no sufficient protection of sotalol against VT. So the decision was made for ventricular ablation. After 5 high frequency-applications no furhter ventricular tachycardia could be induced. Since this intervention the patient lives without symptoms
    Notes: Zusammenfassung Wir berichten über die Möglichkeiten der elektrophysiologischen Diagnostik und Therapie in der Behandlung einer medikamentös nicht sicher einstellbaren symptomatischen linksventrikulären Tachykardie bei einem 10jährigen Jungen mit strukturell unauffälligem kardialem Befund. Bei rechtsschenkelblockartig deformierten QRS-Komplexen im Oberflächen-EGK bei der Aufnahme wurde anhand eines anschließend abgeleiteten Ösophagus-EKG die ventrikuläre Genese der Tachykardie bestätigt. Es erfolgte dann eine erste elektrophysiologische Untersuchung, die eine erhöhte linksventrikuläre Vulnerabilität zeigte. Im Rahmen dieser Untersuchung wurde mittels gezielter ventrikulärer Einzelstimulation die Tachykardie terminiert. Anschließend erfolgte eine medikamentöse Einstellung auf Sotalol. Nach der Aufsättigungsphase wurde eine erneute ventrikuläre Stimulation durchgeführt, die keine Schutzwirkung der Sotalolmedikation nachweisen konnte, so daß die Indikation für eine ventrikuläre Katheterablation gestellt wurde. Nach 5 Hochfrequenzapplikationen linksseptal ließ sich keine ventrikuläre Tachykardie mehr induzieren. Der Patient ist im bisherigen Nachbeobachtungszeitraum beschwerdefrei.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Résumé La répartition de grandeur de particules a été mesurée aux mêmes temps avec deux méthodes différentes dans l'aérosol naturel. La région des diamètres s'étendait de 10−5 jusqu'à 10−6 cm. La première méthode se repose sur la mesurage du courant à travérs un condensateur cylindrique. Ce courant a été causé par la distribution naturelle des charges électrique sur les particules. La deuxieme méthode employe la répartition de produits conséquants du thoron, qui sont fixés aux particules de différente grandeur. Ces deux méthodes ont des sensibilités maximales en différentes régions de grandeur de particules. Les spectres des diamètres, qui sont obtenus avec les deux méthodes, se trouvent en bon accord. La petite différence entre les deux spectres est causée par des erreurs systématiques.
    Notes: Abstract The size distribution of natural occuring aerosol particles with a radius between 10−5 and 10−6cm was measured simultaneously by two different methods: Firstly the measurement of the current, caused by the natural distribution of electric charges on the particles, which move along the axis of a cylindrical condenser; secondly the distribution of thoron decay products on the size spectrum of the aerosol. The both methods have their maximum sensitivity in different regions of the size spectrum. The distributions obtained with the two methods are in rather good agreement. The small deviation of the two spectra is ascribed to systematic differences of the measuring methods.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    International ophthalmology 1 (1979), S. 71-84 
    ISSN: 1573-2630
    Keywords: Choroidal osteomas ; osseous choristomas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The clinical and laboratory findings in fifteen patients with nineteen eyes containing choroidal osteomas are summarized. The first case of the disease in a male patient is reported as well as the development of a second tumor in the previously uninvolved eye of an adult patient and the marked enlargement of the tumor in another. The possible etiology of the choroidal osteomas is discussed.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1435-1544
    Keywords: Key words Antiarrhythmic drugs – catheter ablation – paroxysmal supraventricular tachycardia – adverse events of catheter ablation – adverse events of antiarrhythmic drugs ; Schlüsselwörter Antiarrhythmika – Katheterablation – paroxysmale supraventrikuläre Tachykardie – Komplikationen der Katheterablation – unerwünschte Wirkungen von Antiarrhythmika
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Hintergrund: Die Katheterablation ist eine inzwischen etablierte Methode zur Therapie supraventrikulärer Tachykardien. Allerdings sind bei der Wahl des Therapieverfahrens die Risiken dieser Intervention im Vergleich mit der konservativen Therapie zu berücksichtigen. Hier sind AV-Blockierungen, Lungenembolie, Perikardtamponade (in Einzelfällen mit Todesfolge) und arterielle Embolie zu nennen. Darüber hinaus ist die Strahlenbelastung – insbesondere bei Kindern und Jugendlichen – zu berücksichtigen. Es ist bekannt, daß lange Durchleuchtungszeiten in Einzelfällen zu Röntgenschäden führen können. Andererseits ist die Effektivität antiarrhythmisch wirksamer Substanzen sehr gut dokumentiert. Selbstverständlich haben auch antiarrhythmisch wirksame Medikamente Nebenwirkungen, jedoch können die Daten zum Risiko proarrhythmogener Nebenwirkungen einer Therapie mit Antiarrhythmika der Klasse 1 und 3 nicht auf Patienten mit paroxysmalen supraventrikulären Tachykardien übertragen werden. Schlußfolgerungen: Auf Grund der Risiken der Katheterablation hat die medikamentöse Therapie unverändert einen wichtigen Stellenwert bei der Therapie supraventrikulärer Tachykardien.
    Notes: Background: Catheter ablation is an established method to treat paroxysmal supraventricular tachyarrhythmias. However, the risks of catheter ablation have to bee weight against antiarrhythmic therapy. With catheter ablation AV-block III°, pulmonary embolism, pericardial tamponade (in some cases followed by death), arterial embolism as well as other complications have been described. Especially the long term consequences of prolonged fluoroscopy time are an increased risk for fatal malignancies in young patients. On the other hand the efficacy of antiarrhythmic therapy in patients with paroxysmal supraventricular tachycardia has been shown. The risk of proarrhythmia associated with the treatment with class 1 and class 3 antiarrhythmic drugs that has been documented in patients after mayocardial infarction and in heart failure patients cannot be transferred to patients without structural heart disease. Conclusion: It is concluded that drug therapy is still an important form of treatment in patients with paroxysmal supraventricular tachycardia.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Two patients receiving hemodialysis for chronic renal failure developed bilateral bullous retinal detachment associated with multiple underlying serous detachments of the pigment epithelium. Many of the detachments of the pigment epithelium were surrounded by subretinal whitish exudate that was probably fibrinous in type. There was fluorescein angiographic evidence of dehiscence of the pigment epithelium at the margin of some of the pigment epithelial detachments. Failure to recognize the nature of the retinal detachment in one patient resulted in an unsuccessful scleral buckling procedure
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...