Can you also get a mesh file (.vtk or .stl or other format) from Carto? The points could be used to reconstruct a mesh, but it is not completely trivial
The EA Map Reader expects a zip file from Carto, with the point list text file named as ..._car.txt, mesh file named as ....mesh, and ablation sites file named as VisiTagExport/Sites.txt. Do you get such zip file from your Carto system?
I could load your text file if I renamed as the extension expected it and could create a left atrium mesh using Markups to Model extension:
But it would be better to use the mesh the Carto creates, to be consistent. Also, we would need to find a VTK filter that can nicely map the bipolar or other values from the measurement points to the mesh - while this mapping is probably already available in the mesh file that Carto exported.