Patent ID: 7082335

Claim:
A system for delivering physiological pacing comprising: a lead body having a proximal end and a distal end; an electrode array disposed at the distal end of the lead body, the electrode array including an alternating series of electrodes and spacer elements, the alternating electrodes including a most proximal electrode and a most distal electrode, the most proximal electrode having a proximal edge; and a fixation element affixed to the lead body comprising a fixation member and a collar connected to the fixation member, the fixation element including a helical hook having a proximal portion disposed coaxially about the lead body and forming approximately between 1 and 5 turns about the lead body, the approximately between 1 and 5 turns being embedded within the collar, the helical hook having a distal portion extending out from the collar, forming approximately one turn about the lead body, and having an inner diameter greater than the outer diameter of the collar; the collar being disposed coaxially about a portion of a circumference of the lead body, having an outer diameter greater than an outer diameter of the lead body, and being positioned at a point spaced proximally from the most proximal electrode, the collar including a distal edge spaced between approximately 0.07 inches and 0.09 inches from the proximal edge of the most proximal electrode.