Universal cell carrier

A device for epicardial ablation, comprising:

• a plurality of ablation elements;
• a plurality of carriers disposed adjacent to each other, wherein each carrier includes:
• a first wall extending from a first end surface to a second opposing end surface;
• a second wall extending from the first end surface to the second end surface, wherein the second wall is substantially parallel to the first wall;
• a third wall connecting the first wall to the second wall and wherein the first, second, and third walls define a receiving portion configured to operably receive at least a portion of one of the plurality of ablation elements;
• a plurality of first connection formations disposed on an exterior surface of the first wall, wherein each of the plurality of first connection formations is disposed at a different vertical position on the first wall;
• and
• a plurality of second connection formations disposed on an exterior surface of the second wall, wherein each of the plurality of second connection formations is disposed at a different vertical position on the second wall;
• and
• a plurality of upper members configured to be disposed on the plurality of carriers, wherein each upper member includes a first mating member configured to be received by at least one of the plurality of first connection formations and a second mating member configured to be received by at least one of the plurality of second connection formations.