Fig. 1.

Each dot represents the percentage of patients supported by ECMO (A) or IABP (B) at the time of transplant from January 1, 2014 through May 31, 2020. The monthly change in percentage of patients transplanted is displayed under the time period denoted “old system,” followed by the change in monthly percentage (“slope”) relative to the antecedent period for time periods denoted “New System Published,” “New System,” and “COVID–19.” ECMO, extracorporeal membrane oxygenation; IABP, intra-aortic balloon pump; COVID–19, coronavirus disease 2019.