Systems and methods are provided herein for monitoring electrical activity in
ex vivo, resting donor organs. Systems and methods provided herein also include providing electrical stimulation to the
donor tissue to maintain or increase viability during storage or transport. Donor organs can include
ex vivo, resting hearts. Electrical activity can be used to determine donor organ viability, especially in instances where visual evaluation of a
beating heart is not possible. The same electrodes or other sensing devices used to measure electrical activity can be used to apply a
voltage / current to the tissue as well in order to maintain viability of the organ. In some embodiments, stimulation or depression may be provided in response to the measured electrical activity.