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| Number | Title | Issue Date |
| 5431691 | Method and system for recording and displaying a sequential series of pacing events An implantable pacemaker continuously records pacing events and their respective rates of occurrence in sequence, as they occur, into an Event Record stored in a circular buffer. The circular buffer always contains the most recent events and rates collect... | 07/11/1995 |
| 5385579 | Myocardial body implantable lead A myocardial lead having a tissue stimulating electrode attached via an insulated conductor to an epicardial pad the electrode embedded in the myocardial tissue of either the ventricles or the atria, for use as a pacing and/or sensing electrode. The myoca... | 01/31/1995 |
| 5383911 | Rate-responsive pacemaker having selectable response to arm movement and pedal impacts A rate-responsive pacemaker (10) generates stimulation pulses on demand at a rate determined by a sensor indicated rate (SIR) signal. The pacemaker includes, in a preferred embodiment, an activity sensor (26) that generates a raw sensor signal (27) as a f... | 01/24/1995 |
| 5374281 | Hysteresis in a rate-responsive pacemaker A rate-responsive pacemaker includes programmable hysteresis means for automatically extending an escape interval, EI0, in the presence of sensed intrinsic cardiac activity, and returning the escape interval to its initial value in the presence... | 12/20/1994 |
| 5354328 | Patch electrode for an implantable defibrillator A patch electrode including a generally oval-shaped metallic mesh affixed to a polymer insulation backing and an insulation frame, and further including a plurality of specially designed lattices which divide the metallic mesh into a plurality of windows ... | 10/11/1994 |
| 5350410 | Autocapture system for implantable pulse generator An autocapture system within an implantable pulse generator automatically maintains the energy of a stimulation pulse at a level just above that which is needed to effectuate capture. The electrical post-stimulus signal of the heart following delivery of ... | 09/27/1994 |
| 5350405 | Method and apparatus for capacitor tolerance compensation in a cardiac stimulating device A method and apparatus for determining the actual capacitance of a capacitor in a cardiac stimulating device in order to determine the potential necessary to store a desired amount of energy on the capacitor, are provided. The discharge curve of the capac... | 09/27/1994 |
| 5350401 | Implantable cardioverter/defibrillator device having means for determining and treating low amplitude ventricular fibrillation and method thereof An ICD/pacemaker device provides a shocking pulse whenever it senses cardiac activity indicative ventricular fibrillation by standard means and a unique algorithm to respond to low amplitude ventricular fibrillation that would not be expected to be recogn... | 09/27/1994 |
| 5342405 | System and method for selecting a mode of operation of a dual-chamber pacemaker A system and method for preventing atrial competition during sensor-driven operation of a dual-chamber pacemaker includes means for sensing atrial activity during an atrial refractory period. Atrial competition is avoided by either: (1) generating an atri... | 08/30/1994 |
| 5340361 | Implantable pacemaker having adaptive AV interval adoptively shortened to assure ventricular pacing A dual-chamber implantable pacemaker configured to operate in the DDD or DDDR mode automatically adjusts its AV (or PV) interval to an amount just less than the natural conduction time of a patient, thereby assuring that ventricular pacing occurs in a pat... | 08/23/1994 |
| 5336242 | Band-pass filter for use in a sense amplifier of an implantable cardiac pacer A low-power band-pass filter for use in a cardiac pacer includes a single operational amplifier connected in circuit relationship with a plurality of switched capacitors that function as bilinear resistors. Each bilinear resistor comprises a switch for co... | 08/09/1994 |
| 5334220 | Dual-chamber implantable pacemaker having an adaptive AV interval that prevents ventricular fusion beats and method of operating same A dual-chamber implantable pacemaker automatically adjusts its AV interval so that any ventricular stimulation pulses generated by the pacemaker at the conclusion of the pacemaker-defined AV interval occur at a time in the cardiac cycle that avoids fusion... | 08/02/1994 |
| 5334045 | Universal cable connector for temporarily connecting implantable leads and implantable medical devices with a non-implantable system analyzer A universal cable connector includes a plurality of different sized connectors adapted to mate with the proximal connectors of different sized implantable leads. The cable connector attaches to a system analyzer and enables the system analyzer to interfac... | 08/02/1994 |
| 5330700 | Porous electrode for a pacemaker and method of making same A porous electrode for pacemakers is comprised of a plurality of platinum globules sintered together to form a porous mass of semi-hemispherical shape at the end of a platinum electrode stem. The globules, which are themselves made by sintering together s... | 07/19/1994 |
| 5330523 | Implantable defibrillator patch lead A defibrillator patch lead having a connecting element interconnecting an electrical conductor and a wire mesh electrode pad. The connecting element includes a body portion which has a slot cut therein into which a portion of the wire mesh electrode is in... | 07/19/1994 |
| 5330522 | Ring electrode for a multilumen lead and method of constructing a multilumen lead An implantable pacing lead for use with a cardiac pacemaker having a multilumen tubing for the lead body and at least one ring electrode or electrical contact located between the distal and proximal ends of the pacing lead. The ring electrode includes axi... | 07/19/1994 |
| 5328442 | System and method for stimulating a heart having undergone cardiac myoplasty using a single-chamber pacemaker A bifurcated lead adapter or lead used with an implantable stimulation device, such as a pacemaker, forms part of a stimulation system and method that senses depolarization of the ventricular muscle tissue, and in response thereto, generates a stimulus (c... | 07/12/1994 |
| 5324328 | Conductor for a defibrillator patch lead An electrical conductor assembly utilized, for example, in a defibrillator patch lead to interconnect a pulse generator and monitoring unit, and a wire mesh electrode pad. The electrical conductor includes a Teflon insulated drawn brazed stranded (DBS) wi... | 06/28/1994 |
| 5324325 | Myocardial steroid releasing lead A lead for delivering electrical stimulation pulses to pace the cardiac muscle and for sensing electrical signals occurring in the cardiac muscle is disclosed which as a rigid helix disposed at the extreme distal end thereof which rigid helix may be opera... | 06/28/1994 |
| 5324324 | Coated implantable stimulation electrode and lead An implantable stimulation lead having an anti-inflammatory coating on the exposed surface area of the distal tip electrode. The coating is a semi-viscous or gelatinous material having the ability to absorb physiological fluids to provide electrical condu... | 06/28/1994 |
| 5324311 | Coaxial bipolar connector assembly for implantable medical device A compact connector assembly for an implantable medical device includes a receptacle for receiving the proximal end of a coaxial bipolar lead having a distal end attachable to a desired tissue location. The receptacle includes an open end for receiving th... | 06/28/1994 |
| 5318591 | Implantable cardioverter-defibrillator having early charging capability An implantable cardioverter-defibrillator (ICD) provides a tiered therapy designed to automatically terminate tachyarrhythmias using the least aggressive therapy possible while reducing the "time-to-therapy." The tiered therapy first applies a first tier ... | 06/07/1994 |
| 5318572 | High efficiency tissue stimulating and signal sensing electrode A pacing lead having a porous electrode of platinum-iridium with recessed areas or grooves formed into the surface. The grooves allow for acute electrode stabilization as a result of clot formation and endocardial tissue capture during insertion and immed... | 06/07/1994 |
| 5312455 | Programmable window reference generator for use in an implantable cardiac pacemaker A sense amplifier adapted for use with a cardiac pacer or the like includes a constant gain filter, a window comparator circuit and a programmable threshold reference generator circuit. The reference generator circuit generates a programmable window (refe... | 05/17/1994 |
| 5309919 | Method and system for recording, reporting, and displaying the distribution of pacing events over time and for using same to optimize programming A method and system for monitoring the behavior of an implanted pacemaker counts (records) the number of times that a given internal event or state change of the pacemaker occurs, and also determines the rate at which each event or state change thus count... | 05/10/1994 |
| 5304219 | Multipolar in-line proximal connector assembly for an implantable stimulation device An in-line, multipolar proximal connector assembly for an implantable stimulation lead is provided which incorporates at least one sensor. Advantageously, the present invention uses straight conductive rods, or wires, to electrically connect the proximal ... | 04/19/1994 |
| 5301669 | System and method for preventing atrial competition during sensor-driven operation of a dual-chamber pacemaker A system and method for preventing atrial competition during sensor-driven operation of a dual-chamber pacemaker includes means for sensing atrial activity during an atrial refractory period. Atrial competition is avoided by either: (1) generating an atri... | 04/12/1994 |
| 5292341 | Method and system for determining and automatically adjusting the sensor parameters of a rate-responsive pacemaker A rate-responsive pacing system and method allows the inter-related sensor operating parameters associated with the physiological sensor of a rate-responsive pacemaker to be automatically and/or optimally set for a particular patient. The system includes ... | 03/08/1994 |
| 5282841 | Implantable stimulation device and method of making same A ribbon conductor set and related method of production and installation are provided for electrically interconnecting components in an implantable medical device, such as a heart pacemaker unit or the like. The ribbon conductor set is formed by die cutti... | 02/01/1994 |
| 5275171 | Implantable lead and sensor A physiological sensor forms an integral part of an implantable stimulation/sensing lead used with a medical device, such as a pacemaker. The stimulation/sensing lead includes a tip electrode to which a distal end of a first conductor is connected. The se... | 01/04/1994 |
| 5269299 | System and method for preventing atrial competition during sensor-driven operation of a dual-chamber pacemaker A system and method for preventing atrial competition during sensor-driven operation of a dual-chamber pacemaker includes means for sensing atrial activity during an atrial refractory period. Atrial competition is avoided by either: (1) generating an atri... | 12/14/1993 |
| 5267564 | Pacemaker lead for sensing a physiologic parameter of the body The present invention includes a body implantable lead having a multi-polar proximal connector, at least a first conductor coupled to at least one stimulating electrode, a sensor for sensing at least one physiologic parameter of the body, and a second and... | 12/07/1993 |
| 5264843 | High speed reflected impedance telemetry system for implantable medical device A telemetry system which will transmit data at a relatively high rate while retaining a high degree of accuracy is disclosed which utilizes a servo feedback loop in conjunction with a conventional reflected impedance receiving front end parallel LC circui... | 11/23/1993 |
| 5259395 | Pacemaker lead with extendable retractable lockable fixing helix A body implantable lead including a sheath, an electrode sleeve secured at a distal end of the sheath, a rotor body positioned within the sleeve, a fixing helix secured to a distal end of the rotor body, a torsion spring secured to a proximal end of the r... | 11/09/1993 |
| 5242431 | Suture sleeve assembly with slidable compression collar A suture sleeve assembly for gripping and anchoring the lead body of an implantable medical device, such as a cardiac pacemaker, includes a tubular member adapted to receive the lead body. Disposed about the tubular member is a collar movable longitudinal... | 09/07/1993 |
| 5235742 | Method of making an implantable device A ribbon conductor set and related method of production and installation are provided for electrically interconnecting components in an implantable medical device, such as a heart pacemaker unit or the like. The ribbon conductor set is formed by die cutti... | 08/17/1993 |
| 5228455 | Implant tool for extendable/retractable positive fixation lead An implant tool for use with an endocardial or other implantable lead having an extendable/retractable positive fixation tip includes a hollow cylindrical housing and a custom designed stylet. The cylindrical housing attaches to a proximal end of the impl... | 07/20/1993 |
| 5228439 | System and method for maintaining proper device operation at battery depletion by self-regulating current drain usage A system within an implantable stimulation device and a method for limiting the extent to which rate-responsiveness can be utilized during low battery periods. A battery threshold detector is utilized to detect when the battery is below a predetermined th... | 07/20/1993 |
| 5228438 | Implantable pacemaker including means and method of terminating a pacemaker-mediated tachycardia during rate adaptive pacing An atrial tracking dual-chamber pacemaker and method of use thereof for terminating a pacemaker-mediated tachycardia (PMT). The pacemaker includes means for determining whether the present heart rate exceeds a tachycardia reference rate, and if so, whethe... | 07/20/1993 |
| 5222493 | Verification of capture using an indifferent electrode mounted on the pacemaker connector top A cardiac pacing system includes circuitry for verification of capture having an indifferent electrode mounted on the pacemaker connector top. The cardiac pacing system may use one or two bipolar or unipolar leads. Capture is sensed between the indifferen... | 06/29/1993 |
