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Therapeutic Research
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ペースメーカー植込み後に行った大動脈弁置換術および三尖弁形成術により心機能が軽快し，心室リードの変形・断線を来した1例
JPY
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ライフサイエンス出版
Abstract
The case was an 86–year–old woman. She underwent aortic valve replacement in 2001 and dual chamber pacemaker implantation for sick sinus syndrome in 2005. A ventricular lead was fixed to the right ventricular outflow tract. She was hospitalized for heart failure in February 2008. Echocardiography detected moderate aortic regurgitation, moderate mitral regurgitation, and moderate to severe tricuspid regurgitation. She underwent aortic valve replacement again in October 2008. The impedance and threshold of the ventricular lead gradually deteriorated. A programmer check revealed a fracture of the ventricular lead. We implanted a new ventricular lead and replaced a generator in 2014. Fluoroscopy showed hinge motion at the tip of the ventricular lead.
