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The pandemic from the SARS-CoV‑2 Virus is currently challenging health care systems all over the world. Maintaining appropriate staffing and resources in healthcare facilities is essential to guarantee a safe work environment for healthcare personnel and safe patient care. Extracorporeal membrane oxygenation (ECMO) represents a valuable therapeutic option in patients with severe heart or lung failure. Although only a limited proportion of COVID-19 patients develops respiratory or circulatory failure that is refractory to conventional therapies, it is of utmost importance to clearly define criteria for the use of ECMOs in this steadily growing patient population. The ECMO working group of the Medical University of Vienna has established the following recommendations for ECMO support in COVID-19 patients., (© The Author(s) 2020.)

Background: In the early phase after heart transplantation (HTX) patients are at high risk for infection because of intensified immunosuppression. This retrospective study evaluates the efficacy of a three-month antiviral cytomegalovirus (CMV) prophylaxis., Patients and Methods: 133 patients received a three-month combined intravenous and oral CMV prophylaxis with Ganciclovir (Cymevene after HTX between 1997 and April 2003 (group II). They were compared to a historical group consisting of 40 patients, who had undergone HTX between 1995 and 1996 (group I; CMV-prophylaxis: hyperimmune globuline (Cytotect) for the first post-operative month in combination with orally administered aciclovir (Zovirax) for 6 months). Demographic data of organ recipients and donors in both groups were comparable, except for underlying cardiac diseases (p = 0.016). All patients had identical postoperative immunosuppressive regimes., Results: Group II had a significantly lower mortality rate (GI: 37.5%, GII: 9.8%; p < 0.001); one year survival (p = 0.001) and overall survival (p = 0.001) were significantly better than in group I. Patients of group II had fewer rejection episodes > or = grade II ISHLT requiring treatment (p < 0.001). Group II presented significantly fewer positive CMV blood samples (p = 0.005) and CMV infections (26% versus 47,5% in GI; p = 0.008), and a later onset of infections after HTX than group I (group I with a mean interval of 5.8 weeks after HTX, group II: 24.8 weeks after HTX; p < 0.001)., Conclusion: Incidence of CMV infection was significantly lowered under ganciclovir prophylaxis, infections occurred at a later time point after HTX, when patients were immunologically more competent. The proportion of higher grade rejection episodes was markedly reduced and survival was improved.