Implantable adjustable single-pass A-V lead for use with an impl

Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical energy applicator

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607122, A61N 105

Patent

active

056742746

ABSTRACT:
An adjustable single-pass A-V lead for cardiac pacing comprises a ventricular lead body with a ventricular electrode at its distal tip, and an atrial sheath slidably mounted over the ventricular lead body. An atrial electrode is located on a portion of the atrial sheath that is adapted to form an outwardly-extending atrial bow. A distal portion of the sheath is configured to resist sliding over the ventricular lead body so that the atrial bow is formed when a tubular, proximal portion of the sheath is advanced distally relative to the ventricular lead body. The longitudinal distance between the atrial and ventricular electrodes can be adjusted during implantation by withdrawing the sheath proximally relative to the ventricular lead body. The radial distance between the atrial electrode and the ventricular lead body can then be adjusted by advancing the proximal end of the sheath distally to form the atrial bow, and by manipulating the proximal end of the sheath to control the outward extension of the atrial bow. In an alternative embodiment, the non-tubular portion of the sheath is preformed in a curved configuration, so that the atrial bow forms automatically when a tensional force is released.

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