Patent ID: 9623235
Date: 2017-04-18
CPC Classifications: A61N

Claim:
1. A left ventricular lead for tracking over a guide wire into a coronary sinus and providing active fixation in, or adjacent to, the coronary sinus, the guide wire being configured for coronary sinus lead implantation and having an outer diameter defined by an outer cylindrical surface, the lead comprising: a tubular body comprising a proximal end, a distal end and a central lumen through which the guide wire is extendable; a lead connector end proximally projecting from the proximal end and comprising at least one electrical contact; and a fixed helical anchor comprising a wire member having a diameter of between approximately 0.22 mm and approximately 0.27 mm, the wire member distally extending away from the distal end in a helical arrangement including an inner helical coil diameter defined by a radially inner curved boundary, the inner coil diameter having a size relationship with the outer diameter of the guide wire with the inner coil diameter being larger than the outer diameter of the guide wire within a small range, the size relationship positioning the radially inner curved boundary of the wire member immediately adjacent the outer cylindrical surface of the guide wire when the guide wire extends through the fixed helical anchor.