Systems for monitoring and applying electrical currents in an organ perfusion system

A system for monitoring the electrical activity of an explanted organ, the system comprising:

• an organ chamber assembly configured to contain an explanted heart;
• a first electrode placed in the aortic bloodstream conduit outside the organ chamber assembly;
• a second electrode placed epicardially on the heart within the organ chamber assembly;
• a third electrode placed epicardially on the heart within the organ chamber assembly;
• a controller configured to provide an interface between at least one of the first, second, and third electrode and a defibrillation source wherein the controller receives signals from at least one of the first, second, and third electrode;
• a perfusion fluid;
• and
• a heater assembly that heats the perfusion fluid to a temperature between 26° and 37° C.