Zusammenfassung
Ventrikuläre Tachykardien (VT), Schocks und VT-Cluster sind bei Patienten mit implantierbaren Defibrillatoren (ICD) mit einem erhöhten Risiko für Sterblichkeit und Krankenhausaufenthalte assoziiert. VT-Cluster werden häufig bei einer Verschlechterung der Herzinsuffizienz, im Rahmen von akuten Koronarereignissen und bei Elektrolytimbalancen gesehen. Die Assoziation ist oft nur vage und nur selten kausal. Möglicherweise muss bei Patienten, die ein Substrat für ventrikuläre Reentrytachykardien haben, immer von einer zunehmenden Häufung der VTs ausgegangen werden. Die hohe Rezidivrate von VT-Stürmen nach medikamentöser Einstellung spricht für diese Sichtweise. Die VT-Ablation scheint der medikamentösen Therapie überlegen zu sein. Der optimale Zeitpunkt für eine Ablation ist nicht bekannt. Eine prophylaktische Ablation wird nur von wenigen Zentren vorgenommen. Selbst eine frühzeitige Ablation, z. B. nach dem ersten Schock, wird nur in wenigen Zentren durchgeführt. Obgleich diese Vorgehensweise durchaus leitlinienkonform ist, spricht heute vieles für eine prophylaktische VT-Ablation bereits nach dem ersten Schock, bzw. der ersten VT.
Abstract
Ventricular tachycardia (VT), shock and shock clusters are ominous signs in patients with implantable cardioverter defibrillators (ICDs) and herald an increased risk of hospitalization and mortality. The occurrence of VT clusters has been associated with aggravation of heart failure in 19%, to acute coronary events in 14% and electrolyte imbalance in 10%. However, any association of potential causative factors and aggravation of VT is vague. In patients with a substrate for ventricular re-entry tachycardia, progressive aggravation of ventricular dysrhythmia should possibly be expected. The high recurrence rate of shock clusters despite antiarrhythmic drug therapy supports this view. The optimal timing of VT ablation is unknown but current convention is to perform VT ablation after shock clusters or incessant VT has occurred. Preemptive VT ablation is rarely performed (only in 15% of active centers) and the majority of centers never perform VT ablation even after the first shock. Such practice is within guidelines that recommend VT ablation only in ICD patients with recurrent or incessant VT. However, there is strong data in support of preemptive VT ablation.
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Bänsch, D., Schneider, R., Akin, I. et al. Ablation ventrikulärer Tachykardien bei Herzinsuffizienz. Kardiologe 6, 135–147 (2012). https://doi.org/10.1007/s12181-012-0407-x
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DOI: https://doi.org/10.1007/s12181-012-0407-x
Schlüsselwörter
- VT-Cluster (ventrikuläre Tachykardie)
- Schockcluster
- ICD (implantierbarer Defibrillator)
- Prophylaxe
- VT-Ablation