Upgradable implantable medical device with post-shock pacing and redraw functions
First Claim
1. An implantable medical interventional device adapted to provide therapy to a patient in whom the device is implanted to treat cardiac dysrhythmias including tachyarrhythmia, said device comprising a therapy function generator for providing a plurality of functions corresponding to different levels of therapy for treatment of sensed dysrhythmias, said functions including an electric shock waveform of predetermined energy content for delivery to the patient'"'"'s heart to terminate at least one type of sensed tachyarrhythmia;
- said function generator being responsive to cessation of the tachyarrhythmia following delivery of the electric shock waveform for promptly thereafter applying post-shock pacing pulses to the heart with a magnitude exceeding a predetermined threshold greater than the threshold for normal pacing of the patient'"'"'s heart by the device, for the duration of a period of time sufficient to allow the heart to recover from the shock and to commence sinus rhythm.
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Accused Products
Abstract
An implantable medical interventional device is adapted to provide therapy to a patient in whom the device is implanted to treat cardiac dysrhythmias including tachyarrhythmia. The device performs a plurality of functions corresponding to different levels of therapy for treatment of sensed dysrhythmias, including an electric shock waveform of predetermined energy content for delivery to the patient'"'"'s heart to terminate at least one type of tachyarrhythmia. In response to cessation of the tachyarrhythmia after delivery of the electric shock waveform, the device promptly thereafter applies post-shock pacing pulses to the heart for a period of time sufficient to allow the heart to recover from the shock and to resume substantially normal sinus rhythm. The device may be upgraded by programming to select among the various functions as necessary to provide designated therapy by suppressing some functions and activating others. The functions include, among others, simulating different conditions of interaction between activity of the heart and the therapies offered by the device, based on stored intrinsic heart beat signals over a respective time period with modified settings of parameters associated with the therapies. The results of the simulated different conditions of interaction can be displayed to show the effectiveness of treatment by the device if the dysrhythmia were actually encountered while the device is programmed with the respective time period and parameter settings.
73 Citations
20 Claims
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1. An implantable medical interventional device adapted to provide therapy to a patient in whom the device is implanted to treat cardiac dysrhythmias including tachyarrhythmia, said device comprising a therapy function generator for providing a plurality of functions corresponding to different levels of therapy for treatment of sensed dysrhythmias, said functions including an electric shock waveform of predetermined energy content for delivery to the patient'"'"'s heart to terminate at least one type of sensed tachyarrhythmia;
- said function generator being responsive to cessation of the tachyarrhythmia following delivery of the electric shock waveform for promptly thereafter applying post-shock pacing pulses to the heart with a magnitude exceeding a predetermined threshold greater than the threshold for normal pacing of the patient'"'"'s heart by the device, for the duration of a period of time sufficient to allow the heart to recover from the shock and to commence sinus rhythm.
- View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An implantable medical interventional device adapted to provide therapy to a patient in whom the device is implanted to treat cardiac dysrhythmias including tachyarrhythmia, said device comprising a therapy function generator for providing a plurality of functions corresponding to different levels of therapy for treatment of sensed dysrhythmias, said functions including an electric shock waveform of predetermined energy content for delivery to the patient'"'"'s heart to terminate at least one type of sensed tachyarrhythmia;
- said function generator being responsive to cessation of the tachyarrhythmia following delivery of the electric shock waveform for promptly thereafter applying post-shock pacing pulses to the heart for a period of time sufficient to allow the heart to recover from the shock and to commence sinus rhythm;
said function generator further including means for selectively curtailing or restoring at least some of said functions;
an extended memory, and means for selectively retrieving from said extended memory a stored therapy function having parameters used for successful treatment of a simulated dysrhythmia suffered by the patient, whereby to provide a redraw function by which said successful therapy function is reusable upon sensing an actual occurrence of said simulated dysrhythmia.
- said function generator being responsive to cessation of the tachyarrhythmia following delivery of the electric shock waveform for promptly thereafter applying post-shock pacing pulses to the heart for a period of time sufficient to allow the heart to recover from the shock and to commence sinus rhythm;
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9. Advice-implemented method of treating cardiac dysrhythmias, including tachyarrhythmia, with an implantable medical interventional device adapted to deliver therapy to an implant patient, wherein the device possesses the capability to provide a plurality of functions corresponding to different levels of therapy for treatment of dysrhythmias, said method including the steps of:
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sensing any of a plurality of different types of dysrhythmias of the patient'"'"'s heart; responding to each different type of sensed dysrhythmia by delivering to the patient'"'"'s heart a programmed level of therapy appropriate thereto, including, when at least one type of tachyarrhythmia is sensed, delivering an electric shock waveform of predetermined energy content to a selected chamber of the patient'"'"'s heart to terminate said sensed tachyarrhythmia; and promptly upon cessation of said sensed tachyarrhythmia, ceasing further delivery of the electric shock waveform and instead applying post-shock pacing pulses to the patient'"'"'s heart with a magnitude exceeding a predetermined threshold greater than the threshold for normal pacing of the patient'"'"'s heart by the device, for the duration of a period of time sufficient for the heart to recover from the shock and to commence sinus rhythm. - View Dependent Claims (10, 11)
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12. A device-implemented method of treating cardiac dysrhythmias, including tachyarrhythmia, with an implantable medical interventional device adapted to deliver therapy to an implant patient, wherein the device possesses the capability to provide a plurality of functions corresponding to different levels of therapy for treatment of dysrhythmias, said method including the steps of:
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sensing any of a plurality of different types of dysrhythmias of the patient'"'"'s heart; responding to each different type of sensed dysrhythmia by delivering to the patient'"'"'s heart a programmed level of therapy appropriate thereto, including, when at least one type of tachyarrhythmia is sensed, delivering an electric shock waveform of predetermined energy content to a selected chamber of the patient'"'"'s heart to terminate said sensed tachyarrhythmia; promptly upon cessation of said sensed tachyarrhythmia, ceasing further delivery of the electric shock waveform and instead applying post-shock pacing pulses to the patient'"'"'s heart for a period of time sufficient for the heart to recover from the shock and to commence sinus rhythm, sensing and, when required, pacing cardiac activity of the atrium via a first lead from the device inserted in the patient'"'"'s heart with a bipolar electrode of said first lead positioned in the right atrium; when required, pacing cardiac activity of the ventricle and sensing the underlying ECG via a second lead from the device inserted in the patient'"'"'s heart with an electrode of said second lead positioned in the right ventricle; and when required, delivering defibrillation shocks to the ventricle via a third lead from the device with an electrical coil of said third lead positioned in the right ventricle relative to an electrode positioned external to the ventricle. - View Dependent Claims (13, 14, 15)
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16. A device-implemented method of treating cardiac dysrhythmias, including tachyarrhythmia, with an implantable medical interventional device adapted to deliver therapy to an implant patient, wherein the device possesses the capability to provide a plurality of functions corresponding to different levels of therapy for treatment of dysrhythmias, said method including the steps of:
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sensing any of a plurality of different types of dysrhythmias of the patient'"'"'s heart; responding to each different type of sensed dysrhythmia by delivering to the patient'"'"'s heart a programmed level of therapy appropriate thereto, including, when at least one type of tachyarrhythmia is sensed, delivering an electric shock waveform of predetermined energy content to a selected chamber of the patient'"'"'s heart to terminate said sensed tachyarrhythmia; promptly upon cessation of said sensed tachyarrhythmia, ceasing further delivery of the electric shock waveform and instead applying post-shock pacing pulses to the patient'"'"'s heart for a period of time sufficient for the heart to recover from the shock and to commence sinus rhythm, and selectively retrieving from an extended memory of the device a stored therapy function having parameters used for successful treatment of a simulated dysrhythmia suffered by the patient, whereby to provide a redraw function by which said successful therapy function is reusable upon sensing an actual occurrence of said simulated dysrhythmia.
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17. An implantable medical interventional device for delivering an appropriate therapy to an implant patient suffering from one or more cardiac dysrhythmias, said device comprising a therapy generator for providing said appropriate therapy from among a plurality of therapies available from said generator in response to a respective sensed dysrhythmia, one said appropriate therapy being an electric shock waveform of relatively high energy content for delivery to a selected chamber of the patient'"'"'s heart to terminate a tachyarrhythmia thereof;
- said therapy generator including a portion responsive to cessation of further delivery of said electric shock waveform to the selected chamber upon termination of said tachyarrhythmia for promptly thereupon applying post-shock pacing pulses to said selected chamber for a period of time sufficient to allow the patient'"'"'s heart to recover from said shock waveform and to commence a sinus rhythm;
said device further including a programmable portion for selectively temporarily disabling the availability of any one or more, including said electric shock waveform, but less than all, of said plurality of therapies from said generator. - View Dependent Claims (18, 19)
- said therapy generator including a portion responsive to cessation of further delivery of said electric shock waveform to the selected chamber upon termination of said tachyarrhythmia for promptly thereupon applying post-shock pacing pulses to said selected chamber for a period of time sufficient to allow the patient'"'"'s heart to recover from said shock waveform and to commence a sinus rhythm;
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20. An implantable pacemaker/cardioverter/defibrillator device adapted to be upgraded from time to time to enable the device to provide additional therapy for treatment of dysrhythmias in a patient in whom the device is implanted, as the needs of the patient for such treatment undergo change, said device comprising a therapy function generator for providing a plurality of functions corresponding to different levels of therapy for treatment of dysrhythmias;
- means for sensing any of a plurality of different types of dysrhythmias;
means responsive to each different type of dysrhythmia sensed by said sensing means for enabling said function generator to provide a level of therapy appropriate to the respective sensed dysrhythmia, said plurality of functions including an electric shock waveform of predetermined energy content for delivery to a selected chamber of the patient'"'"'s heart to terminate a sensed tachyarrhythmia and a waveform containing a plurality of post-shock pacing pulses to be delivered to the heart promptly following termination of said tachyarrhythmia for a period of time sufficient to allow the heart to recover from the shock waveform and to resume substantially normal sinus rhythm; and
means for programmably curtailing the availability of at least some of said plurality of functions from said function generator and for selectively restoring the curtailed functions when needed upon access through a security code.
- means for sensing any of a plurality of different types of dysrhythmias;
Specification