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
    ISSN: 1432-1238
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    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 151 (1992), S. 160-166 
    ISSN: 1432-1076
    Keywords: Congenital heart disease ; Exercise response ; Heart rate response to exercise ; Oxygen-pulse during exercise
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Normal children achieve the same increase of oxygen uptake (VO2) in response to exercise even though resting and submaximal exercise heart rates vary greatly as a function of age, body size and physical conditioning. To determine whether the VO2 response to exercise is altered when heart rate is significantly reduced by heart disease, we compared 78 children who achieved a peak exercise heart rate of ≤150 beats/min to 201 controls of similar body size and normal peak exercise heart rates of ≥180 beats/min. All performed incremental (16.4 Watts/min) maximal cycle exercise. Separate analysis of males and females included heart rate, power (kg-m/min, Watts/kg), VO2 (ml/min, ml/min per kg), O2 pulse (VO2/heart beat), VE (l/min) and R (VCO2/VO2) at rest and during the 1st, 4th and last minute of exercise. Patients with low peak exercise heart rates had also lower resting submaximal exercise heart rates than controls. VO2 at comparable exercise levels did not differ from controls and consequently O2 pulse was greater in the patients than controls at rest and at all levels of exercise. A consistent gender difference was only found in controls where males achieved a higher VO2 and lower heart rates at comparable levels of exercise. The data show a normal exercise VO2 despite significantly lower heart rates. These findings cannot be explained by an increased arteriovenous difference alone and suggest that the patients retained the ability to effectively modulate stroke volume.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1435-1285
    Keywords: Key words Pulmonary hypertension – prostacyclin – aerosol – evaluation – postoperative ; Schlüsselwörter Pulmonale Hypertension – Prostazyklin – Aerosol – Evaluation – postoperativ
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Hintergrund: Inhalatives Stickmonoxyd (NO) wirkt selektiv auf den pulmonalen Gefäßwiderstand und wird bei der Therapie von Patienten mit pulmonaler Hypertension (PHT) eingesetzt, jedoch mit hohem apparativem Aufwand und nicht immer erfolgreich („non‐responder”). Wir evaluierten die Wirksamkeit von aerosolisiertem Prostazyklin (aePGI2) als therapeutische Alternative zu NO. Patienten und Methodik:Bei einer Herzkatheteruntersuchung wurde mittels NO und aePGI2 die pulmonale Vasoreagibilität von Patienten mit intrakardialen Shuntvitien und Eisenmengen‐Reaktion (Gruppe 1a, n = 30) und Patienten mit primärer und postoperativer PHT (Gruppe 1b, n = 13) untersucht; unmittelbar postoperativ wurde auf der Intensivstation aePGI2 im Vergleich zu NO bei postoperativer PHT eingesetzt (Gruppe 2, n = 6). Ergebnisse:Der Lungengefäßwiderstand konnte signifikant gesenkt werden (Gruppe 1a: von 91 % des Systemwiderstandes auf 58 % mit NO bzw. 53 % mit aePGI2; Gruppe 1b: von 20,2 Wood Units * m2 auf 13,4 bzw. 11,3; Gruppe 2: von 24,9 Wood Units * m2 auf 13,4 bzw. 11,3; Gruppe 2: von 24,9 Wood Units * m2 auf 10,5 bzw. 9,5), der Herzminutenvolumen‐Index erhöhte sich (Gruppe 1b: von 2,96 auf 3,55 und 3,96 l/min * m2, Gruppe 2: von 1,57 auf 1,89 und 2,00 l/min * m2). Schlußfolgerung: Der kurzfristige Einsatz von aePGI2zeigt eine mit NO vergleichbare selektive pulmonale Vasodilatation und erscheint bei entsprechendem umfassendem Monitoring zur akuten Behandlung von pulmonalhypertensiven Zuständen vertretbar.
    Notes: Summary Background: Inhaled nitric oxide (NO) has been shown to selectively lower pulmonary vascular resistance and is applied in patients with pulmonary hypertension (PHT). However, application and monitoring is complex and not always successful („non‐responders”). We evaluated the effect of aerolized prostacyclin (aePGI2) as a therapeutic alternate to NO. Patients and methods: aePGI2 and NO were applied to patients with different causes of pulmonary hypertension (Group 1a: preoperative patients with intracardiac shunting defects and Eisenmenger's disease, n = 30; Group 1b: patients with primary or postoperative PHT, n = 13; Group 2: PHT immediately following surgery for congenital heart disease, n = 6). Results: Pulmonary vascular resistance could be lowered significantly (Group 1a: from 91 % of systemic vascular resistance to 58 % with NO and 53 % with aePGI2; Group 1b: from 20.2 Wood Units * m2 to 13.4 and 11.3; Group 2: from 24.9 Wood Units * m2 to 9.5 and 10.5); cardiac index increased (Group 1b: 2.96 to 3.55 and 3.96l/min * m2, Group 2: from 1,57 to 1,89 and 2.00l/min * m2). Conclusions: The short‐term application of aePGI2shows a selective pulmonary vasodilation similar to NO. Given adequate monitoring, aePGI2 appears to be useful for the acute treatment of PHT.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1432-1238
    Keywords: Key words Nitric oxide ; Rebound ; Pulmonary hypertension ; Dynamic respiratory system compliance ; Interaction ; Congenital heart disease compliance ; Interaction ; Congenital heart disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To assess the interaction between pulmonary hemodynamics and respiratory mechanics during acute pulmonary hypertension. Patients: Ventilated and paralysed children treated with inhaled nitric oxide because of post-operative pulmonary hypertension. Interventions: Weaning of inhaled nitric oxide. Measurements: Air flow and airway pressure, calculation of dynamic respiratory system compliance and respiratory system resistance for each breath by multiple linear regression. Results: In four patients, increases in pulmonary arterial pressure from 26.1 to 56.7 mmg (p 〈 0.001) during weaning off nitric oxide were associated with decreases in tidal volume (from 9.7 → 8.2 ml/kg, p 〈 0.01) and reductions in dynamic respiratory system compliance (from 0.52 → 0.34 cmH20/ml/kg, p 〈 0.001), while respiratory system resistance was unchanged. Conclusions: Impaired ventilation during acute pulmonary hypertension is predominantly related to a reduction in respiratory system compliance.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1432-1238
    Keywords: Key words Children ; Cardiac output ; Ventilation ; Diastole
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A low cardiac output state is an important cause of morbidity and mortality following repair of tetralogy of Fallot (ToF). This is often refractory to conventional measures. The cardiac output of these patients is highly dependent on diastolic pulmonary arterial flow which is enhanced during spontaneous respiration, but much reduced by intermittent positive pressure ventilation (IPPV).¶We report the successful use of negative pressure ventilation (NPV) as haemodynamic therapy in three children with a low output secondary to restrictive right ventricular (RV) physiology following ToF repair. NPV produced a significant haemodynamic improvement, with increases in cardiac output of greater than 100 % in two of the children. By augmenting pulmonary blood flow, and hence cardiac output, NPV has a role as adjunctive haemodynamic therapy in patients with a low output secondary to diastolic RV dysfunction, in whom early extubation is not possible.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 1433-0474
    Keywords: Schlüsselwörter Multifokale atriale Tachykardie (MAT) ; Chaotische Vorhoftachykardie ; Antiarrhythmische Therapie ; Säugling ; Angeborene Herzfehler ; Key words Multifocal atrial tachycardia (MAT) ; Chaotic atrial rhythm ; Antiarrhythmic therapy ; Infancy ; Congenital heart defects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Definition: Multifocal atrial tachycardia (MAT) (also called chaotic atrial rhythm or mechanism) is a rare rhythm disturbance in infancy and childhood. It usually occurs as a sequela of chronic obstructive lung disease in adults with an incidence of about 0,5% and a high mortality rate. In infancy, the incidence has been estimated to be about 0,2%, mainly found in young infants. Diagnosis: It is characterized by an atrial frequency greater than 100 per minute, 3 or more different p-wave contours, variable PP, RR and PR-intervals, and a discrete isoelectric baseline. The origin of the arrhythmia remains unclear but atrial distension may play a significant role. Discussion: We report on the clinical course and management of two patients and also review the relevant literature.
    Notes: Zusammenfassung Definition: Die multifokale atriale Tachykardie (MAT) bzw. chaotische atriale Tachykardie oder chaotische Vorhoftachykardie ist im Kindesalter selten. Im Erwachsenenalter ist sie vorwiegend bei Patienten mit akuten oder chronischen Lungenerkrankungen beschrieben und mit einer hohen Letalität behaftet. Im Gegensatz zum Auftreten im Erwachsenenalter besitzt die MAT im Kindesalter durchweg eine gute Prognose. Diagnose: Elektrokardiographisch ist die MAT durch mindestens 3 unterschiedlich konfigurierte P-Wellen charakterisiert, die nicht der elektrischen Sinusachse entsprechen. Es besteht eine isoelektrische Linie zwischen den P-Wellen, die Vorhoffrequenz beträgt normalerweise mehr als 100 Schläge/min mit variablen P-P-, P-R- und R-R-Intervallen. Die Genese dieser Tachyarrhythmie ist unklar, eine Vorhofbelastung als Auslöser ist jedoch wahrscheinlich. Diskussion: Die möglichen Ursachen und Therapiestrategien bei chaotischer Vorhoftachykardie werden anhand zweier Kasuistiken diskutiert und eine Übersicht über die vorliegende Literatur gegeben.
    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...