PROBLEM TO BE SOLVED: To provide a pacing lead for a left cavity of the heart, which has a very small diameter and includes an active portion stimulating a plurality of areas of epicardium.SOLUTION: The pacing lead includes an extendable microcable to be implanted in cornary vein systems 14-22, the microcable being formed from an electrically-conducting material and having a distal end and a proximal end. The distal end has an active portion 34, the active portion 34 has a plurality of clear naked areas, and the clear naked areas form a network of stimulation electrodes electrically connected to each other for contact 40 with the wall of a target vein 22 of the cornary systems. The proximal end has a terminal for connecting the microcable to a generator of an active implanted medical device. The expandable microcable is composed of a plurality of twisted wires with a French diameter of 0.5-2, wherein at least some of the twisted wires include a core material which is formed of a radiopaque material and covered with a sheath of a mechanically durable material, or a core material which is covered in the reversed manner.COPYRIGHT: (C)2012,JPO&INPIT【課題】直径が非常に小さく、心外膜の複数の領域を刺激する能動部分を有する左心腔ペーシング用リードを提供する。【解決手段】冠状静脈系14-22に植込みされる、導電素材で形成されて遠位端と近位端とを有する伸縮式マイクロケーブルを具備し、遠位端は能動自由部分34を有し、能動自由部分34は複数の明瞭裸領域を備え、明瞭裸領域は冠状動脈系の目標静脈22の壁との接触40のために互いに電気的に接続された刺激電極のネットワークを形成し、近位端はマイクロケーブルを能動植込み型医療装置のジェネレータに連結する端子を有し、伸縮式マイクロケーブルは0.5~2フレンチの直径と、縒り合わされた複数の縒り線であって、少なくとも何本かの縒り線が、機械的耐久性のある素材のシースによって包まれた放射線不透過性素材で形成された心材か、又はその逆の包み方をされた心材を包含してなるペーシング用リードとする。【選択図】図1
