Abstract: The invention relates to a test cable which has an at least two-wire design and which is provided for a sterile application, e.g. during the implantation of a cardiac pacemaker. The test cable serves as an electrical connection between the probe (electrode connector 1) and the test device (24). The test cable comprises electrical connecting elements assigned to the test device (24) and the contact elements which can be connected to the electrical contact surfaces (contact pin 3 and electrode connector ring 4) of the probe. The test cable has a thin flexible litz wire line (12) and is designed as a disposable part. In addition, the first contact element is configured as an alligator clip (9) and the second contact element is configured or as a contact spring (5) or a contact sleeve.

Abstract: A catheter electrode shell (2) has cutouts (3) made in such a way that a closed circular ring (4) is preserved to secure the electrode shell (2) to the catheter tube. The remaining contact surface (5) is arranged on the outside of the catheter curvature in the case of pre-bent or guided catheters.

Abstract: An implantable electrode type lead assembly of the flexible type which is particularly adapted for implantation in the cardiac muscle for applications such as use with a pacemaker. The lead assembly has an electrode head which includes a fixation spiral for implantation into tissue and as well as a blocking mechanism. The electrode head includes all of the elements required for the blocking function of the mechanism and can be released by axial movement of the fixation spiral or of a connector block associated with the spiral.

Abstract: An implantable lead assembly to electrically stimulate the heart from a stimulus generator has an electrode head with a surface portion conducive to electrical stimulation, the head having a contour concentric with the axis except along a portion indented toward the axis to form a recess in the head. A conductive lead fastened to the head electrically connects the stimulation-conducive surface portion to the stimulus generator. A rigid hook is secured in fixed relation to the head with the curved portion of the hook lying at all times substantially within the recess and the tip of the hook normally unrestrained to project at all times at least slightly from the recess to engage heart tissue when the head is rotated about the axis by twisting the lead in the direction in which the tip is pointed.

Abstract: Electrode for implantation in the heart, particularly for stimulating the heart muscle, including an electrode lead, a helix protruding at the end of the electrode lead near the heart for screwing the electrode into cardiac tissue, and a protective device protruding beyond the front end of the helix, during insertion of the electrode, against inadvertent hooking-in while the electrode is being inserted through a vein, the device including a cylindrical body which is axially movable within the helix, relative thereto so that it is flush with or protrudes beyond the front end of the helix during the insertion of the electrode and can be removed from the region of the helix which is to be screwed into the tissue by means of an element actuatable from outside of the patient's body in order to fasten the helix in the cardiac tissue.

Abstract: Implantable electrode, particularly for implantation in a cardiac ventricle in order to stimulate the cardiac muscle, including an insulated electrode lead and at least one fastening element for fixing the electrode end so as to bring a conductive region forming the stimulation surface of the electrode into contact with body tissue, the fastening element being retracted in the region of the electrode end forming the electrode head so that during the insertion phase it can be accommodated substantially within the outer contour of the electrode head touched by body tissue and, in order to fix the electrode end, the fastening element is arranged to be movable relative to the outer contour of the electrode in such a manner that it comes to lie behind the frontal face of the electrode head laterally outside of the outer contour so as to engage in the body tissue.

Abstract: A body-implantable, intravascular lead affixed with a pin or pins at its proximal end adapted to be connected to a cardiac pacemaker pulse generator and with an electrode or electrodes at its distal end adapted to be securely and permanently attached to a body organ through endothelial tissue. An electrode in spiral shaped form of a rigid, electrically conductive helix with a sharp tip at the distal end of the lead is adapted to be screwed through endothelial tissue into the body organ by means of a rotational motion applied to the conductor at the proximal end of the lead.