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We report a case of a 60-year-old female with a history of colorectal cancer treated with nivolumab immunotherapy who presented with new cardiomyopathy complicated by cardiogenic shock and ventricular arrhythmias. Treatment of ICI-associated myocarditis requires aggressive immunosuppression and supportive therapy. In this case, the patient required advanced mechanical circulatory support as a bridge to recovery. This case highlights the complexity of diagnosis, haemodynamic management, and treatment of fulminant ICI myocarditis.<\/jats:p>","DOI":"10.1002\/ehf2.13545","type":"journal-article","created":{"date-parts":[[2021,8,13]],"date-time":"2021-08-13T03:51:44Z","timestamp":1628826704000},"page":"4301-4306","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Keeping Immune Checkpoint Inhibitor Myocarditis in Check: Advanced Circulatory Mechanical Support as a Bridge to Recovery"],"prefix":"10.1093","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6261-6431","authenticated-orcid":false,"given":"Ashley F.","family":"Stein-Merlob","sequence":"first","affiliation":[{"name":"Division of Cardiology, Department of Medicine, University of California, Los Angeles , MD 650 Charles E. 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Young Dr. South, A2-27 CHS, Los Angeles, CA, 90095 ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Allison","family":"Ferreira","sequence":"additional","affiliation":[{"name":"Division of Critical Care, Department of Emergency Medicine, University of California , Los Angeles, CA ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Megan M.","family":"Price","sequence":"additional","affiliation":[{"name":"Division of Hematology\/Oncology, Texas Oncology-Baylor Charles A. 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Young Dr. South, A2-27 CHS, Los Angeles, CA, 90095 ,","place":["USA"]},{"name":"Ahmanson UCLA-Cardiomyopathy Center, Division of Cardiology, Department of Medicine, University of California, Los Angeles , Los Angeles, CA ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mario C.","family":"Deng","sequence":"additional","affiliation":[{"name":"Division of Cardiology, Department of Medicine, University of California, Los Angeles , MD 650 Charles E. Young Dr. South, A2-27 CHS, Los Angeles, CA, 90095 ,","place":["USA"]},{"name":"Ahmanson UCLA-Cardiomyopathy Center, Division of Cardiology, Department of Medicine, University of California, Los Angeles , Los Angeles, CA ,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rushi V.","family":"Parikh","sequence":"additional","affiliation":[{"name":"Division of Cardiology, Department of Medicine, University of California, Los Angeles , MD 650 Charles E. 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