Patents by Inventor Sven-Erik Hedberg
Sven-Erik Hedberg has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20080091239Abstract: In a cardiac assist device and method, a microphone is placed in contact with the epicardium of the heart of a patient, and heart and lung sounds are simultaneously detected at the placement location of the microphone. The heart and lung sounds are automatically analyzed to set an appropriate cardiac therapy for the patient.Type: ApplicationFiled: October 16, 2006Publication date: April 17, 2008Inventors: Anna-Karin Johansson, Kenth Nilsson, Cecilia Tuvstedt, Kjell Noren, Anders Bjorling, Andreas Blomqvist, Berit Larsson, Sven-Erik Hedberg, Karin Jarverud, Nils Holmstrom
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Patent number: 7353061Abstract: A biventricular cardiac stimulation device has a pulse generator for delivering stimulation pulses at least to the ventricles of a patient's heart. An evoked response detector has independent first and second ventricular sensing channels for ventricular evoked response detection in the ventricles. The pulse generator is controlled to deliver stimulation pulses to the second ventricle with a VV time delay after delivery of a stimulation pulse to the first-stimulated ventricle, the VV time delay being shorter than an evoked response detection time window that follows delivery of the stimulation pulse to the first-stimulated ventricle. An evoked response detector closes the evoked response detection window, or discards detections therein, in response to the emission of a stimulation pulse to the second-stimulated ventricle during the evoked response detection time window of the first-stimulated ventricle.Type: GrantFiled: September 25, 2003Date of Patent: April 1, 2008Assignee: St. Jude Medical ABInventors: Sven-Erik Hedberg, Anders Björling, Per Lagercrantz
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Patent number: 7228172Abstract: An implantable bi-ventricular heart stimulating device and system, suitable for treating congestive heart failure, have a control circuit with first and second pacing circuits and first and second sensing circuits. The device operates with time cycles corresponding to normal heart cycles. The control circuit determines: (a) whether a signal typical of an evoked response to a pacing pulse delivered by the first pacing circuit is sensed within a first time interval and (b) whether a signal typical for an R-wave transferred from the second ventricle, or from some other part of the heart, to the first ventricle is detected within a first time window. The operation of the device depends on whether the conditions (a) and (b) are fulfilled.Type: GrantFiled: December 13, 2003Date of Patent: June 5, 2007Assignee: St. Jude Medical ABInventors: Karin Järverud, Nils Holmström, Anders Björling, Asa Uhrenius, Sven-Erik Hedberg, Göran Budgifvars, Hans Strandberg
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Patent number: 7184816Abstract: 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 second circuit can be connected to a second electrode member suited to be positioned in or at a second ventricle of the heart. The control circuit is able to detect whether signals sensed by the second circuit are likely to be far field signals. The control circuit performs this detection by at least determining whether, during a predetermined time (length, more signals are sensed by the second circuit than by the first circuit.Type: GrantFiled: June 9, 2004Date of Patent: February 27, 2007Assignee: St. Jude Medical ABInventors: Anders Björling, Sven-Erik Hedberg, Nils Holmström
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Patent number: 7089058Abstract: A multi-chamber pacing system has a pulse generator for successively delivering pacing pulses to chambers of a patient's heart. Evoked response detectors having blanking intervals following the delivery of pacing pulses include sensing elements for sensing IEGM-signals from each of the heart chambers and an integrating unit that integrates the IEGM-signal within evoked response detection time windows after delivery of pacing pulses for detecting evoked response. The evoked response detection time window for a heart chamber contain at least one blanking interval resulting from delivery of a pacing pulse to another chamber and each of the sensed IEGM signals having a generally known morphology. An integral reconstructing unit reconstructs the time integral of the IEGM signal from one of the heart chambers in the blanking interval following delivery of a pacing pulse to another heart chamber.Type: GrantFiled: March 31, 2004Date of Patent: August 8, 2006Assignee: St. Jude Medical ABInventors: Sven-Erik Hedberg, Anders Björling, Nils Holmström, Karin Järverud
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Patent number: 7085602Abstract: An implantable bi-ventricular heart stimulating device (10) has a control circuit with first and second sensing circuits for respectively sensing in the two ventricles and first and second stimulation circuits for respectively stimulating the two ventricles. The control circuit determines whether a signal, sensed by said second sensing circuit, occurs essentially simultaneously with a signal sensed by the first sensing circuit. Furthermore, the control circuit determines whether a further signal is sensed by said second sensing circuit within a predetermined time interval which follows after the signal sensed by the second sensing circuit but within the same time cycle as that signal. If this occurs, the control circuit determines whether the sensed signals represent actual cardiac events, or are likely the result of far field detection.Type: GrantFiled: November 24, 2003Date of Patent: August 1, 2006Assignee: St. Jude Medical ABInventors: Sven-Erik Hedberg, Asa Uhrenius, Karin Jarverud, Hans Strandberg, Nils Holmström, Anders Björling, Göran Budgifvars
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Publication number: 20060149155Abstract: An implantable medical apparatus for detecting diastolic heart failure, DHF, has a DHF determining device for determining at least one blood pressure parameter for detecting a DHF state of the heart of a patient. The DHF determining device has a pressure measuring unit for measuring the absolute value of left atrial pressure during the diastasis phase just before atrial contraction, or the absolute value of the pressure in the pulmonary vein when the pulmonary valve is closed, for a predetermined workload situation and a rest situation of the patient. A comparator compares the difference between left atrial pressure or pulmonary vein pressure, in the workload and rest situations, with a predetermined pressure difference reference value. A pacemaker includes such an apparatus and a control unit that optimizes pacing therapy depending on the result of the comparisons with the reference values.Type: ApplicationFiled: May 13, 2004Publication date: July 6, 2006Inventor: Sven-Erik Hedberg
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Publication number: 20060149327Abstract: An implantable medical apparatus for detecting diastolic heart failure, DHF, has a DHF determining device for determining at least one blood pressure parameter for detecting a DHF state of the heart of a patient. The DHF determining device includes a pressure measuring unit for measuring pulse pressure in a cardiac cycle for a predetermined workload situation of the patient as the blood pressure parameter, and a comparator compares the measured pulse pressure with a predetermined reference value. A pacemaker includes such an apparatus and a control unit that optimizes pacing therapy depending on the result of the comparison of the measured pulse pressures with the predetermined reference values.Type: ApplicationFiled: April 26, 2004Publication date: July 6, 2006Inventors: Sven-erik Hedberg, Anders Bjorling, Maria Torpo, Karin Ljungstrom
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Patent number: 7069076Abstract: A multi-chamber pacing system has a pulse generator for successively delivering pacing pulses to chambers of a patient's heart, and IEGM signal detectors, having blanking intervals following the delivery of pacing pulses, including sensing circuits for sensing IEGM-signals from each of the heart chambers. Each of said sensed IEGM signals has a generally known morphology. A signal-reconstructing unit reconstructs the IEGM signal from one of the heart chambers in the blanking interval following delivery of a pacing pulse to another heart chamber.Type: GrantFiled: January 21, 2004Date of Patent: June 27, 2006Assignee: St. Jude Medical ABInventors: Sven Erik Hedberg, Karin Järverud, Nils Holmström, Anders Björling
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Patent number: 6961613Abstract: An implantable bi-ventricular heart stimulating device has a control circuit that within a time cycle, delivers pacing pulses with both first and second pacing circuits with a time gap between a pacing pulse delivered by these pacing circuits. The time gap can be such that a pacing pulse delivered by the second pacing circuits falls substantially within a first time interval in which an evoked response can be expected to a pacing pulse delivered by the first pacing circuit. The control circuit performs a temporary modification of the operation of the device such that during at least one time cycle no pacing pulse is delivered by the second pacing circuit during the first time interval.Type: GrantFiled: November 13, 2003Date of Patent: November 1, 2005Assignee: St. Jude Medical ABInventors: Anders Björling, Nils Holmström, Sven-Erik Hedberg, Asa Uhrenius
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Patent number: 6950696Abstract: A circuit and method for detecting cardiac rhythm abnormalities employ unipolar signals respectively obtained from a cardiac lead having a tip at which a number of separate electrodes are disposed, the electrodes being simultaneously in contact with cardiac tissue. The respective unipolar signals which are obtained from the multiple electrodes exhibit a time relationship relative to each other, and this time relationship is analyzed to determine whether a cardiac rhythm abnormality is present or one or more of the unipolar signals is compared to a template which is known to represent a cardiac abnormality. Analysis of the time relation is undertaken by determining the absolute value of a time offset between any two of the unipolar signals, or by correlating any two of the unipolar signals.Type: GrantFiled: November 27, 2001Date of Patent: September 27, 2005Assignee: St. Jude Medical ABInventors: Anders Björling, Sven-Erik Hedberg, Ulf Lindegren, Anders Lindgren
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Patent number: 6944500Abstract: In a method and circuit for monitoring an oscillator in a medical implant, a physiological parameter is obtained from a subject in whom the medical implant is implanted and an electric signal containing a time component, is generated based on the physiological parameter. The functioning of the oscillator is monitored using this electric signal to identify if the functioning of the oscillator deviates from a specified functioning of the oscillator.Type: GrantFiled: May 22, 2000Date of Patent: September 13, 2005Assignee: St. Jude Medical ABInventors: Sven-Erik Hedberg, Jonas Andersson
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Patent number: 6915162Abstract: An implantable medical device has a pressure sensing arrangement to measure right ventricular pressure of a heart including a pressure sensor adapted to be positioned in the right ventricle of the heart, to measure the pressure and to generate a pressure signal in response to the measured pressure. The pressure sensing arrangement also has a pressure signal processor and a timing unit. The processor determines from the pressure signal, using diastolic timing signals from the timing unit based on the pressure signal identifying the diastolic phase, a diastolic pressure signal representing the ventricular pressure only during the diastolic phase of the heart cycle.Type: GrantFiled: November 15, 2001Date of Patent: July 5, 2005Assignee: St. Jude Medical ABInventors: Kjell Noren, Charlotte Kjellmann, Kenth Nilsson, Sven-Erik Hedberg
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Publication number: 20050004607Abstract: 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 second circuit can be connected to a second electrode member suited to be positioned in or at a second ventricle of the heart. The control circuit is able to detect whether signals sensed by the second circuit are likely to be far field signals. The control circuit performs this detection by at least determining whether, during a predetermined time (length, more signals are sensed by the second circuit than by the first circuit.Type: ApplicationFiled: June 9, 2004Publication date: January 6, 2005Inventors: Anders Bjorling, Sven-Erik Hedberg, Nils Holmstrom
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Publication number: 20040243187Abstract: An implantable bi-ventricular heart stimulating device (10) has a control circuit with first and second sensing circuits for respectively sensing in the two ventricles and first and second stimulation circuits for respectively stimulating the two ventricles. The control circuit determines whether a signal, sensed by said second sensing circuit, occurs essentially simultaneously with a signal sensed by the first sensing circuit. Furthermore, the control circuit determines whether a further signal is sensed by said second sensing circuit within a predetermined time interval which follows after the signal sensed by the second sensing circuit but within the same time cycle as that signal. If this occurs, the control circuit determines whether the sensed signals represent actual cardiac events, or are likely the result of far field detection.Type: ApplicationFiled: November 24, 2003Publication date: December 2, 2004Applicant: St. Jude Medical ABInventors: Sven-Erik Hedberg, Asa Uhrenius, Karin Jarverud, Hans Strandberg, Nils Holmstrom, Anders Bjorling, Goran Budgifvars
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Publication number: 20040193226Abstract: A multi-chamber pacing system has a pulse generator for successively delivering pacing pulses to chambers of a patient's heart. Evoked response detectors having blanking intervals following the delivery of pacing pulses include sensing elements for sensing IEGM-signals from each of the heart chambers and an integrating unit that integrates the IEGM-signal within evoked response detection time windows after delivery of pacing pulses for detecting evoked response. The evoked response detection time window for a heart chamber contain at least one blanking interval resulting from delivery of a pacing pulse to another chamber and each of the sensed IEGM signals having a generally known morphology. An integral reconstructing unit reconstructs the time integral of the IEGM signal from one of the heart chambers in the blanking interval following delivery of a pacing pulse to another heart chamber.Type: ApplicationFiled: March 31, 2004Publication date: September 30, 2004Applicant: St. Jude Medical ABInventors: Sven-Erik Hedberg, Anders Bjorling, Nils Holmstrom, Karin Jarverud
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Publication number: 20040193224Abstract: A multi-chamber pacing system has a pulse generator for successively delivering pacing pulses to chambers of a patient's heart, and IEGM signal detectors, having blanking intervals following the delivery of pacing pulses, including sensing circuits for sensing IEGM-signals from each of the heart chambers. Each of said sensed IEGM signals has a generally known morphology. A signal-reconstructing unit reconstructs the IEGM signal from one of the heart chambers in the blanking interval following delivery of a pacing pulse to another heart chamber.Type: ApplicationFiled: January 21, 2004Publication date: September 30, 2004Applicant: St. Jude Medical ABInventors: Sven Erik Hedberg, Karin Jarverud, Nils Holmstrom, Anders Bjorling
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Publication number: 20040127951Abstract: An implantable bi-ventricular heart stimulating device and system, suitable for treating congestive heart failure, have a control circuit with first and second pacing circuits and first and second sensing circuits. The device operates with time cycles corresponding to normal heart cycles. The control circuit determines: (a) whether a signal typical of an evoked response to a pacing pulse delivered by the first pacing circuit is sensed within a first time interval and (b) whether a signal typical for an R-wave transferred from the second ventricle, or from some other part of the heart, to the first ventricle is detected within a first time window. The operation of the device depends on whether the conditions (a) and (b) are fulfilled.Type: ApplicationFiled: December 13, 2003Publication date: July 1, 2004Applicant: St. Jude Medical ABInventors: Karin Jarverud, Nils Holmstrom, Anders Bjorling, Asa Uhrenius, Sven-Erik Hedberg, Goran Budgifvars, Hans Strandberg
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Publication number: 20040116971Abstract: An implantable bi-ventricular heart stimulating device has a control circuit that within a time cycle, delivers pacing pulses with both first and second pacing circuits with a time gap between a pacing pulse delivered by these pacing circuits. The time gap can be such that a pacing pulse delivered by the second pacing circuits falls substantially within a first time interval in which an evoked response can be expected to a pacing pulse delivered by the first pacing circuit. The control circuit performs a temporary modification of the operation of the device such that during at least one time cycle no pacing pulse is delivered by the second pacing circuit during the first time interval.Type: ApplicationFiled: November 13, 2003Publication date: June 17, 2004Applicant: St. Jude Medical ABInventors: Anders Bjorling, Nils Holmstrom, Sven-Erik Hedberg, Asa Uhrenius
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Patent number: 6728575Abstract: A cardiac lead has an end adapted for contact with cardiac tissue that has a number of dot-like electrodes which are separated from each other by electrically insulating material, and which are positioned at respective locations adapted for simultaneous contact with the cardiac tissue. The dot-like electrodes produce respective unipolar signals. At least one difference signal from the unipolar signals of a pair of the dot-like electrodes. The difference signal is edited in circuitry of a cardiac assist device and is compared to a threshold. If the threshold is exceeded, a signal indicating a cardiac rhythm abnormality, such as fibrillation, is generated for triggering electrical therapy delivered to the cardiac tissue by the cardiac assist device.Type: GrantFiled: November 30, 2001Date of Patent: April 27, 2004Assignee: St. Jude Medical ABInventor: Sven-Erik Hedberg