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Verbesserung der linksventrikulären Kontraktilität durch Stimulation in der absoluten Refraktärperiode

Kardiale Kontraktilitätsmodulation

Improving left ventricular contraction by stimulation during the absolute refractory period

Cardiac contractility modulation

Herzschrittmachertherapie + Elektrophysiologie volume 22, pages 27–33 (2011)Cite this article

Zusammenfassung

Die „cardiac contractility modulation“ (CCM) stellt neben der kardialen Resynchronisationstherapie (CRT) eine weitere elektrische Stimulationsform und Therapieoption dar, die bei medikamentös optimal behandelten Herzinsuffizienzpatienten eine Verbesserung ihrer Belastbarkeit und Lebensqualität bewirken kann. Die CCM erfolgt durch die Abgabe einer im Vergleich zu einem konventionellen Schrittmacherstimulus etwa 100-mal höheren Energie in der absoluten Refraktärphase des Aktionspotenzials. Diese „nicht-excitatorischen“ Impulse lösen somit kein zusätzliches Aktionspotential aus, rekrutieren keine zusätzlichen kontraktilen Elemente und initiieren somit keine zusätzliche Kontraktion.

Die intermittierende Stimulationsabgabe erfolgt über 2 rechtsseptal transvenös platzierte Schraubelektroden, die mit der zusätzlichen Vorhofelektrode mit dem wiederaufladbaren Aggregat verbunden sind. Das Kontraktilitätsmodulationssystem verfügt weder über eine herkömmliche antibradykarde noch über eine antitachykarde Funktion.

Abstract

Cardiac contractility modulating (CCM) signals are nonexcitatory signals applied during the absolute refractory period and have been shown to enhance the strength of left ventricular contraction in studies performed in animals and humans with heart failure. In patients with congestive heart failure, improvement of exercise tolerance and quality of life have been shown. Recent studies from myocardial biopsies demonstrate that CCM treatment normalizes expression of many genes that are abnormally expressed in heart failure, including proteins involved with calcium cycling. These findings suggest that CCM might be an alternative or even additional electrical treatment option for patients with heart failure and normal QRS duration delivered by a pacemaker, e.g., a rechargeable device without any antibradycardiac or antitachycardiac function.

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Interessenskonflikt

Der korrespondierende Autor weist auf folgende Beziehungen hin: Referententätigkeit und Studienteilnehmer für Biotronik, Medtronic, St Jude Medical, Impulse Dynamics und Boston Scientific.

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  1. Kardiologie, Herzzentrum Brandenburg in Bernau , Bernau, Deutschland

    C. Butter

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  1. C. Butter
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Correspondence to C. Butter.

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Butter, C. Verbesserung der linksventrikulären Kontraktilität durch Stimulation in der absoluten Refraktärperiode. Herzschr. Elektrophys. 22, 27–33 (2011). https://doi.org/10.1007/s00399-011-0120-7

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  • DOI: https://doi.org/10.1007/s00399-011-0120-7

Schlüsselwörter

  • Kardiale Kontraktilitätsmodulation
  • Elektrische Herzinsuffizienztherapie
  • Genexpression
  • Nichtexzitatorische Stimulation
  • Herzinsuffizienz

Keywords

  • Cardiac contractility modulating
  • Heart failure
  • Electrical heart failure therapy
  • Gene expression
  • Congestive heart failure