Malfunction of Cardiac Resynchronization Therapy due to Subsequent Fracture of the Ring and Tip Conductors of a Co-radial Left Ventricular Bipolar Lead

In two patients treated with cardiac resynchronization therapy (CRT), left ventricular (LV) pacing failure occurred due to ring conductor fractures of the bipolar LV lead (co-radial model). CRT was resumed by pacing between the tip conductor of the LV lead and the coil conductor of the right ventric...

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