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Ventricular assist device therapy and heart transplantation: Benefits, drawbacks, and outlook

Mechanische Herzunterstützung und Herztransplantation: Möglichkeiten, Limitationen und Perspektiven

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Abstract

End-stage heart failure is associated with significant morbidity and mortality. Heart transplantation has the potential to offer a return to daily activities for critically ill patients and is the gold standard therapy. However, heart transplantations are decreasing yearly with a historic low in Germany in 2017. By striking contrast, both waiting list numbers and waiting time have increased owing to a lack of acceptable donor organs. Ventricular assist devices (VAD) represent a reasonable therapeutic alternative for patients on heart transplantation waiting lists. Patients ineligible for transplantation may undergo VAD implantation as a destination therapy. However, the necessity for life-long anticoagulation must be weighed against bleeding complications in potential VAD candidates. VAD-dependent patients also face risks of driveline infections, in addition to restricted activities of daily living owing to limited battery capacities. Given Germany’s low transplantation rate, VAD implantation may serve as a middle ground. With the recent events in transplantation medicine, trust among the German population has declined. Transplant centers must ensure graft quality and ongoing care, define minimum caseload for accreditation, and implement specialty care units in heart failure. Furthermore, the legislation shift from extended consent to dissent solution has the potential to end donor organ shortage.

Zusammenfassung

Ein terminales Herzversagen ist mit einer hohen Morbidität und Mortalität assoziiert. Eine Herztransplantation bietet eine adäquate Therapie, kann die Lebensqualität der Patienten wiederherstellen und ist nach wie vor der Goldstandard. Die Anzahl der Transplantationen sinkt jedoch jährlich mit einem historischen Tiefpunkt in Deutschland im Jahr 2017. Dagegen steigen die Anzahl der Patienten auf der Warteliste und die Wartezeit aufgrund des zunehmenden Mangels an akzeptablen Spenderorganen. Mechanische Herzunterstützungssysteme bieten eine Alternative für Patienten auf der Warteliste. Patienten, welche nicht für eine Herztransplantation infrage kommen, können im Sinne einer endgültigen Therapie („destination therapy“) hiermit ebenfalls eine akzeptable Lebensqualität zurückerhalten. Diese Systeme benötigen jedoch eine dauerhafte Antikoagulation, um Embolien zu vermeiden. Dadurch sind die Patienten durch Blutungskomplikationen und Infektionen an der Austrittsstelle des Verbindungskabels bedroht. Der Alltag wird zudem durch die Haltbarkeit der Batterien begrenzt. Aufgrund der jährlich sinkenden Spender- und somit auch Transplantationszahlen besteht jetzt Handlungsbedarf. Seit dem Transplantationsskandal ist das Vertrauen der Bevölkerung in Deutschland gesunken. Eine Umstrukturierung der Transplantationszentren zur Verbesserung der Qualität und der Überlebensrate der Herztransplantation ist notwendig. Hierzu zählen die Etablierung von Herzinsuffizienzstationen sowie die Definition von Mindestzahlen für Transplantationen. Darüber hinaus könnte eine Änderung der Gesetzeslage weg von der erweiterten Zustimmungslösung und hin zur Widerspruchslösung die Organknappheit beseitigen.

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Correspondence to C. Hagl.

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S. Buchholz, S.P.W. Guenther, S. Michel, R. Schramm, and C. Hagl declare that they have no competing interests.

This article does not contain any studies with human participants or animals performed by any of the authors.

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Buchholz, S., Guenther, S.P.W., Michel, S. et al. Ventricular assist device therapy and heart transplantation: Benefits, drawbacks, and outlook. Herz 43, 406–414 (2018). https://doi.org/10.1007/s00059-018-4713-3

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