Catheter with electrode strip

A method for producing a medical device, the method comprising:

• providing an elongate probe, which is adapted for insertion into the body cavity;
• wrapping an electrode strip around the probe so as to define a helix having distal and proximal ends and a length therebetween, the strip comprising an elongate insulating substrate having a plurality of electrodes fixed thereto and disposed along the length of the helix and further having electrical conductors, coupled to the electrodes, running along the substrate over the length of the helix so as to communicate with circuitry associated with the probe;
• and
• fixing the substrate to an outer surface of the probe over substantially all of the length of the helix.

A method for medical diagnosis, comprising:

• inserting an elongate probe into a body cavity of a mammalian subject, the probe having an elongate insulating substrate wrapped around a distal portion of the probe so as to define a helix having distal and proximal ends and a length therebetween, the substrate being fixed to an outer surface of the probe over substantially all of the length of the helix, wherein a plurality of electrodes are disposed along the length of the helix and fixed to the substrate, and wherein electrical conductors are coupled to the electrodes and run along the substrate over the length of the helix;
• disposing the probe in the body cavity so that the electrodes sense electrophysiological activity within the cavity;
• and
• receiving and processing signals from the electrodes via the conductors.