Detection of catheter location, orientation, and movement direction

A system comprising:

• a catheter comprising a first electrode and a second electrode, the first electrode configured to transmit first electromagnetic signals and the second electrode configured to transmit second electromagnetic signals;
• a first patch, a second patch, and a third patch each configured to receive the first and second electromagnetic signals and arranged in a triangular formation on a first surface of a patient's body;
• a processor configured to:
• determine, at a first time, a first catheter position relative to the first patch, the second patch, and the third patch, based on the first electromagnetic signals and the second electromagnetic signals received at the first patch, the second patch, and the third patch;
• determine, at a second time, a second catheter position relative to the first patch, the second patch, the third patch, based on the first electromagnetic signals and the second electromagnetic signals received at the first patch, the second patch, and the third patch;
• and
• provide the first catheter position and the second catheter position relative to the first catheter position, to a display such that the first catheter position is visually connected to the second catheter position, wherein the first catheter position and the second catheter position each comprise a location and an orientation.