Abstract: A low profile transvenous electrode system for use in an emergency to sequentially pace both the atrium and ventricle of the heart in a dual chamber mode that includes a plurality of pre-formed, pre-shaped resilient insulated electrical wires bundled together in a tubular, flexible retaining sheath that is used as a guide and delivery system during insertion and removal of the electrode system. When the sheath is retracted, it allows the wires to escape from the sheath and because of their pre-formed shape, each wire having memory, the wires spread out and contact the endocardial surfaces inside the ventricle and atrium chambers. Each of the wires have ball tips to provide high current density and sensitivity.

Abstract: An electrode in the form of a conductive balloon is mounted in a head or other body part band. An open face flange with teeth accurately spaced about the flange is secured to the headband. The teeth extend through the head band from one side and fit into spaced slots or holes in a back plate located on the other side of the headband. A portion of the headband is captured by the teeth between the flange and the back plate. A conductive fabric is held between the open face flange and the headband and covers the opening in the flange. When the flange and back plate are drawn or pressed together and held by the teeth secured in the openings in the back plate part of the captured part of the headband is forced out of the opening in the flange. Since the conductive fabric covers the opening in the flange the conductive fabric is pushed upwards by the headband material forced out of the flange opening forming a conductive balloon electrode.