A multi-area pacing lead for the left heart chamber that can be implanted in the coronary venous network

摘要

The lead (10) has a free active portion whose proximal corrugated portion and a distal corrugated portion are separated from each other by an intermediate portion (20), where length in axial direction of each corrugated portion is between 1 to 5 cm in a deployed state and length in axial direction of the intermediate portion is between 5 and 20 cm. The corrugated portions are elastically deformable between a free state in absence of radial stress and a deployed state in presence of the stress. A flexible element (12) comprises a microcable having diameter less than or equal to 0.66 mm. The flexible element is made of a conductive material. The microcable comprises multiple microwire strands, where a set of microwire strands incorporates a core of a radio-opaque material wrapped in a sheath of a mechanically durable material e.g. nickel-titanium alloy or stainless steel, or vice versa. The free active portion comprises multiple electrodes (14, 16) formed by multiple separate denuded areas of coating.