1. A method comprising: acquiring an image of or pertaining to a heart; acquiring a first data set pertaining to one or more locations of a heart vector of the heart, the first data set being spatially correlated with the image; acquiring a second data set pertaining to one or more locations of the heart vector of the heart; receiving first and second data sets at a processor; and registering, via the processor, a representation of a probe with the image by registering the location of the heart vector from the first data set with the location of the heart vector from the second data set, wherein the second data set is acquired using at least one lead positioned on a skin surface, wherein the location of the heart vector from the second data set can be determined relative to the lead, and wherein the location of the probe can also be determined relative to the lead.