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Pacing in the presence of electromagnetic interference

A pacing pulse, electrode technology, applied in electrotherapy, therapy, cardiac stimulator, etc., can solve the problem of not knowing the pacemaker

Active Publication Date: 2016-01-06
MEDTRONIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if at 218 it is determined that EMI is present, the microprocessor has no way of knowing whether the signal sensed by the pacemaker is really the result of a cardiac event or the result of EMI in the pacemaker electronics

Method used

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  • Pacing in the presence of electromagnetic interference
  • Pacing in the presence of electromagnetic interference
  • Pacing in the presence of electromagnetic interference

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Embodiment Construction

[0018] figure 1 is a conceptual diagram illustrating an environment 10 in which a patient 12 with an implantable medical system 14 is exposed to an external field 18 . exist figure 1 In the example shown, the environment 10 includes an MRI device 16 that generates an external field 18 . MRI device 16 generates magnetic and RF fields to produce images of anatomy for diagnosing injuries, diseases, and / or disorders. In particular, the MRI apparatus 16 generates static magnetic fields, gradient magnetic fields, and RF fields as are known in the art. A static magnetic field is a large time-invariant magnetic field that is always present around the MRI apparatus 16 whether or not an MRI procedure is in progress. Gradient magnetic fields are pulsed magnetic fields that are generally only present during MRI procedures. RF fields are high-frequency pulsed fields and are generally only present during MRI procedures.

[0019] Static, gradient, and RF fields vary in magnitude, freq...

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Abstract

The present disclosure provides pacing techniques that reduce the effects of noise-induced oversensing on pacing therapy. The IMD delivers a pacing pulse after sensing the electrical signal on the lead when the sensed electrical signal coincides with an independently detected noise signal and the sensed electrical signal occurs during a period in which the intrinsic cardiac signal is expected. In some cases, the IMD may trigger delivery of the pacing pulse during the escape interval rather than waiting for the escape interval to expire. By reducing the risks associated with inappropriate pacing inhibition and reducing the risks associated with pacing during vulnerable periods of the cardiac cycle, pacing according to the presently disclosed technology may allow for improved therapy during MRI procedures.

Description

technical field [0001] The present disclosure generally relates to implantable medical systems. More particularly, this disclosure describes techniques for pacing in the presence of electromagnetic interference (EMI). Background technique [0002] Various implantable medical systems that deliver therapy or monitor a patient's physiological condition have been clinically implanted in patients or are proposed for clinical implant monitoring in patients. An implantable medical system may include an implantable medical lead connected to an implantable medical device (IMD). For example, implantable leads are often connected to implantable pacemakers, defibrillators, cardioverters, etc. to form an implantable cardiac system that provides electrical stimulation to the heart or senses the electrical activity of the heart. Electrical stimulation pulses can be delivered to the heart, and electrodes deployed on the leads (eg, generally near the distal ends of the leads) can sense the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N1/362A61N1/37A61N1/08
CPCA61N1/3718
Inventor M·L·埃林森H·J·尹P·L·帕里什
Owner MEDTRONIC INC