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| Number | Title | Issue Date |
| 7353059 | Medical device with low EMI leakage A medical device is configured to attenuate emission of electromagnetic radiation and comprises a housing, a circuit assembly mounted in the housing, and a panel coupled to the housing and to the circuit assembly. The panel comprises a first conductive region on an ... | 04/01/2008 |
| 7260428 | Shield arrangement for ECG lead wires A grounding arrangement in a system using the same connector for 5- and 12-lead connection in ECG-measurement. If 5-lead configuration is used, the connector elements of the 12-lead connection are used for grounding of lead wire shields through a current limiting ci... | 08/21/2007 |
| 7245965 | Implantable cardiac device providing mode switching and automatic atrial sensitivity control and method An implantable cardiac stimulation device, mode switchable between atrial tracking and atrial non-tracking pacing modes includes a threshold control for controlling atrial sensing threshold. The threshold control reduces the sensing threshold from a first threshold ... | 07/17/2007 |
| 7221975 | Signal filtering using orthogonal polynomials and removal of edge effects A method and device for filtering an input signal containing wanted signal components and unwanted signal components, wherein the signal is modeled as a set of polynomials. Polynomials from the set are identified to model the unwanted signal components. These unwant... | 05/22/2007 |
| 7218969 | Dynamic channel selection for RF telemetry with implantable device A telemetry system for radio-frequency communications between an implantable medical device and an external device providing improved noise immunity is disclosed. Multiple communications channels are used to enable establishment and re-establishment of communication... | 05/15/2007 |
| 7184816 | Cardiac stimulating and detecting device, system and method for identifying far field signals In an implantable heart stimulating device, system and method, a control circuit has first and second circuits for sensing and pacing. The first circuit can be connected to a first electrode member suited to be positioned in or at a first ventricle of the heart. The... | 02/27/2007 |
| 7171269 | Method of analysis of medical signals A method of analysis of medical signals which uses wavelet transform analysis to decompose cardiac signals. Apparatus for carrying out the method, and cardiac apparatus adapted to employ the method are also described. ... | 01/30/2007 |
| 7155275 | Method and apparatus for adjusting cardiac event detection threshold based on dynamic noise estimation An implantable cardiac rhythm management (CRM) device includes a sensing and detection circuit that senses at least one cardiac signal and detects cardiac electrical events from the sensed cardiac signal using a detection threshold that is adjusted based on a dynami... | 12/26/2006 |
| 7099715 | Distributed cardiac activity monitoring with selective filtering System and techniques for distributed monitoring of cardiac activity include selective T wave filtering. In general, in one implementation, a distributed cardiac activity monitoring system includes a monitoring apparatus, with a selectively activated T wave filter, ... | 08/29/2006 |
| 7082328 | Methods and apparatus for controlling a pacing system in the presence of EMI Pacing systems are disclosed including detectors for detecting the presence of electromagnetic interference and setting an interference state pacing mode and pacing rate. The interference state pacing mode and pacing rate are altered as a function of patient pacemak... | 07/25/2006 |
| 7076283 | Device for sensing cardiac activity in an implantable medical device in the presence of magnetic resonance imaging interference A method is provided, the method comprising detecting a magnetic resonance imaging (MRI) interference signal and enabling at least one preventive measure to protect an implantable medical device from interference by the magnetic resonance imaging (MRI) interference ... | 07/11/2006 |
| 7039455 | Apparatus and method for removing magnetic resonance imaging-induced noise from ECG signals An apparatus and method is provided for improving the quality of electrocardiogram (ECG) signals obtained from a patient undergoing magnetic resonance imaging (MRI) wherein the ECG signal has relatively high levels of noise or interference voltages induced on it by ... | 05/02/2006 |
| 7021960 | Monitoring cable A monitoring cable includes a cable including plurality of individual wires each extending substantially an entire length of the monitoring cable and a plurality of electrodes each electrically connected to a respective one of the plurality of individual wires and p... | 04/04/2006 |
| 7013180 | Conditioning of coupled electromagnetic signals on a lead A method and an apparatus for reducing coupled electrical energy resulting from an electromagnetic field. Embodiments of the present invention provide for an elongate body having a proximal end portion, a middle portion, and a distal end portion and at least one coi... | 03/14/2006 |
| 6925325 | Voltage sensing system with input impedance balancing for electrocardiogram (ECG) sensing applications A voltage sensing system includes input impedance balancing for electrocardiogram (ECG) sensing or other applications, providing immunity to common-mode noise signals while capable of use with two electrodes. Signals are received at first and second electrodes havin... | 08/02/2005 |
| 6917830 | Method and system for noise measurement in an implantable cardiac device An implantable cardiac rhythm management device is configured to estimating the noise level and noise floor in a sensing channel by measuring the magnitude of signal in the sensing channel when noise is determined to be present or absent, respectively. The presence ... | 07/12/2005 |
| 6892092 | Cardiac rhythm management system with noise detector utilizing a hysteresis providing threshold A system, method, or device determines whether noise is present on a sampled and/or digitized sensed intrinsic cardiac signal based on a moving count of turning/inflection points of the signal. If noise is detected, the manner in which the cardiac signal is acquired... | 05/10/2005 |
| 6873869 | Method and apparatus for obtaining an electrocardiograph A method of obtaining an electrocardiograph (ECG) of a patient located in a turbulent electromagnetic environment. The method includes recovering an ECG signal from a patient. The signal, including added noise, is recovered near the cardiac region as the differentia... | 03/29/2005 |
| 6827695 | Method of determining depth of compressions during cardio-pulmonary resuscitation A method of processing a raw acceleration signal, measured by an accelerometer-based compression monitor, to produce an accurate and precise estimated actual depth of chest compressions. The raw acceleration signal is filtered during integration and then a moving av... | 12/07/2004 |
| 6829507 | Apparatus for determining the actual status of a piezoelectric sensor in a medical implant In an apparatus for determining the actual status of a piezoelectric sensor in a medical implant, electrical charges generated in the sensor, in response to changes in acceleration and/or gravitational force or other loads acting on the sensor, are continuously dete... | 12/07/2004 |
| 6754527 | System and method for reducing noise in an implantable medical device A system and method for reducing the amount of noise causes by inductive elements within an implantable medical device. In particular, the invention provides a system for gradually initiating and terminating the current flow within inductive elements such as transfo... | 06/22/2004 |
| 6643540 | Voltage sensing system with input impedance balancing for electrocardiogram (ECG) sensing applications A voltage sensing system includes input impedance balancing for electrocardiogram (ECG) sensing or other applications, providing immunity to common-mode noise signals while capable of use with two electrodes. Signals are received at first and second elect... | 11/04/2003 |
| 6625484 | Signal evaluation method for detecting QRS complexes in electrocardiogram signals A signal evaluation method for detecting QRS complexes in electrocardiogram signals incorporates the following process steps: sampling of the signal (4) and conversion to discrete signal values (x(n)) in chronological order, determining the sign of eac... | 09/23/2003 |
| 6622044 | System and method for removing narrowband noise A system and method for removing narrowband noise from an input signal in which notch filters having notch frequencies corresponding to the noise are dynamically adjusted in accordance with a detected noise spectrum. The method may be applied to telemetry... | 09/16/2003 |
| 6584345 | Apparatus and method for measuring a plurality of electrical signals from the body of a patient An apparatus for measuring electrical signals emanating from a body of a patient, and, in particular, from the patient's heart, comprises a catheter having an electrode array, preferably on its distal end. The apparatus of the invention further comprises ... | 06/24/2003 |
| 6584351 | Implantable cardiac stimulator with circuitry for removing noise in sensed electrical signals An implantable medical device, such as a cardiac stimulator, has a noise cancelling circuit which cancels noise signals relating to body movements which originate outside of the heart, and which are sensed between a noise sensing electrode located outside... | 06/24/2003 |
| 6574510 | Telemetry apparatus and method for an implantable medical device An apparatus and method for enabling radio-frequency communications with an implantable medical device utilizing far-field electromagnetic radiation. Such radio-frequency communications can take place over much greater distances than with inductively coup... | 06/03/2003 |
| 6556871 | System and method for receiving telemetry data from an implantable medical device A system and method for receiving telemetry data from implantable medical devices such as cardiac pacemakers with improved noise immunity is disclosed. Ambient noise levels and signal strength are monitored and used to adaptively adjust the detection sens... | 04/29/2003 |
| 6512944 | Low distortion ECG filter A low pass filter especially adapted for use with ECG equipment designed to negate any noise energy that may be superimposed upon the ECG signal itself. A plurality of low-pass FIR filter stages are connected in tandem between a signal input point and a s... | 01/28/2003 |
| 6493584 | Implantable cardiac stimulation device and method which discriminates between noise and cardiac activity An implantable cardiac stimulation device discriminates between noise and an arrhythmia sensed in a heart. A first sensing circuit generates a first signal representing electrical activity sensed in a first location of the heart and a second sensing circu... | 12/10/2002 |
| 6473649 | Rate management during automatic capture verification An implantable cardiac rhythm management device capable of automatically detecting intrinsic and evoked response of a patient's heart and suitable for use during capture verification. The device of the present invention may operate in an automatic capture... | 10/29/2002 |
| 6438406 | Voltage sensing system with input impedance balancing for electrocardiogram (ECG) sensing applications A voltage sensing system includes input impedance balancing for electrocardiogram (ECG) sensing or other applications, providing immunity to common-mode noise signals while capable of use with two electrodes. Signals are received at first and second elect... | 08/20/2002 |
| 6434426 | Method and system for determining a noise floor in a cardiac pacing system A method for determining a representative noise floor in a cardiac pacing system from which future events are measured is provided. An event amplitude is determined. Pluralities of noise levels are recorded, when each of the plurality of noise levels is l... | 08/13/2002 |
| 6405076 | Artifact rejector for repetitive physiologic-event-signal data An artifact rejector for repetitive physiologic-event-signal data generated from electronically-controlled physiologic-event-measuring equipment includes a physiologic-event-signal averager in communication with such physiologic-event-measuring equipment.... | 06/11/2002 |
| 6397100 | Axis shift analysis of electrocardiogram signal parameters especially applicable for multivector analysis by implantable medical devices, and use of same We show how to determine whether there has been an axis shift in an electrocardiogram waveform and how to use this for filtering out bad electrocardiogram information and to modify an adaptive filter that can be used to adapt the filtering of such electro... | 05/28/2002 |
| 6334068 | Intraoperative neuroelectrophysiological monitor An economically manufactured, highly sensitive, noise and interference resistant, AC powered, two, four or eight channel intraoperative neuroelectrophysiological monitor includes a mainframe having a touch panel display and a low noise interface cable pro... | 12/25/2001 |
| 6324421 | Axis shift analysis of electrocardiogram signal parameters especially applicable for multivector analysis by implantable medical devices, and use of same We show how to determine whether there has been an axis shift in an electrocardiogram waveform and how to use this for filtering out bad electrocardiogram information and to modify an adaptive filter that can be used to adapt the filtering of such electro... | 11/27/2001 |
| 6266624 | Method conducted in a computer for classification of a time series having a prescribable number of samples A method for determining conditioned entropies for a prescribable plurality of future sampling times for a set of samples based upon an information flow. A classification of a time series is implemented on the basis of the information flow. The informatio... | 07/24/2001 |
| 6249696 | Method and apparatus for increasing the low frequency dynamic range of a digital ECG measuring system An ECG signal measuring system uses low frequency compression/enhancement techniques combined with dither techniques to effectively increase the dynamic range while maintaining resolution. This aspect of the present invention is achieved without increasin... | 06/19/2001 |
| 6246902 | Lead set filter for a patient monitor A shielded conductor path comprising: a first signal conductor having an input end for acquiring a physiological signal and an output end for coupling the physiological signal to a physiological signal input of a patient monitor, and a second signal condu... | 06/12/2001 |
