MRI Compatible Leadless Cardiac Pacemaker
First Claim
1. A leadless biostimulator, comprising:
- a housing adapted to be implanted in or on a human heart;
a first electrode and a second electrode coupled to the housing;
a pulse generator disposed in the housing and electrically coupled to the first and second electrodes, the pulse generator configured to generate and deliver electrical pulses to heart tissue via the first and second electrodes; and
a battery disposed in the housing and coupled to the pulse generator, the battery configured to supply energy for electrical pulse generation;
wherein a loop area defined by a lead path from the first electrode to the second electrode and returning to the first electrode through the pulse generator is less than 1 cm2.
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Accused Products
Abstract
An implantable battery powered leadless pacemaker or biostimulator is provided that may include any of a number of features. One feature of the biostimulator is that it safely operates under a wide range of MRI conditions. One feature of the biostimulator is that it has a total volume small enough to avoid excessive image artifacts during a MRI procedure. Another feature of the biostimulator is that it has reduced path lengths between electrodes to minimize tissue heating at the site of the biostimulator. Yet another feature of the biostimulator is that a current loop area within the biostimulator is small enough to reduce an induced current and voltage in the biostimulator during MRI procedures. Methods associated with use of the biostimulator are also covered.
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Citations
14 Claims
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1. A leadless biostimulator, comprising:
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a housing adapted to be implanted in or on a human heart; a first electrode and a second electrode coupled to the housing; a pulse generator disposed in the housing and electrically coupled to the first and second electrodes, the pulse generator configured to generate and deliver electrical pulses to heart tissue via the first and second electrodes; and a battery disposed in the housing and coupled to the pulse generator, the battery configured to supply energy for electrical pulse generation; wherein a loop area defined by a lead path from the first electrode to the second electrode and returning to the first electrode through the pulse generator is less than 1 cm2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification