Cardiac Surface Grid Series
Thin-film polyimide arrays that sit on the heart surface and move with it, built so that motion artifact rather than signal amplitude is what limits a recording on a beating surface.
The problem a cardiac array actually solves
On the cortex, a surface array has to follow a curved surface that moves slightly. On the heart it has to follow a surface that deforms substantially, several times a second, for the whole recording. The limit on a cardiac surface recording is therefore rarely amplitude — it is motion artifact, and an array that loses and regains contact through the cycle produces signal that cannot be separated from the mechanics.
The 12 µm polyimide substrate keeps contact through the cardiac cycle, and the arrays are engineered and tested specifically to minimize noise from tissue movement.
Layouts
Accordion designs (CS2x2x4-accord-…) fold to accommodate deformation along one axis.
Segmented 8×8 designs (CS8x8-seg-…, CS8x8-mesoA-…) divide the array so that regions flex
independently rather than as one sheet.
Specifications
12 µm polyimide, platinum sites, 4 to 256 sites by design, site areas of 160 and 177 µm² (catalog designs use 575 µm contacts), on a 150 mm × 1 mm cable.
Combined preparations
Cardiac surface grids combine with penetrating probes, for work spanning surface field potentials and depth recording in the same preparation.
Research use only.