Method and apparatus for localizing myocardial infarction during catheterization
First Claim
1. A system for localizing myocardial infarction (MI) in a heart having a cardiac wall, the system comprising:
- a catheter including a distal end configured for placement in a location on the cardiac wall;
a myocardial tissue property sensor incorporated into the distal end of the catheter and adapted to be placed in a myocardial region, the myocardial tissue property sensor including at least a portion configured to penetrate into tissue in the myocardial region and a contractility sensor being an accelerometer array including a plurality of accelerometers configured to sense acceleration signals from a plurality of myocardial locations in the myocardial region, the acceleration signals each indicative of a tissue property; and
a tissue property analyzer including an input to receive the acceleration signals and an output indicative of whether the acceleration signals indicate infarcted tissue.
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Abstract
A catheter with a tissue property sensor provides for localization of myocardial infarction (MI) by utilizing one or more differences between properties of infarcted myocardial tissue and properties of normal myocardial tissue. The tissue property sensor is to be placed on endocardial wall or epicardial wall during catheterization to sense at least one tissue property allowing for detection of MI. In one embodiment, the tissue property sensor includes a contractility sensor and senses a tissue property in various locations on endocardial wall or epicardial wall and detects substantial changes in the tissue property that indicate a boundary between infarcted tissue and normal tissue.
79 Citations
20 Claims
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1. A system for localizing myocardial infarction (MI) in a heart having a cardiac wall, the system comprising:
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a catheter including a distal end configured for placement in a location on the cardiac wall; a myocardial tissue property sensor incorporated into the distal end of the catheter and adapted to be placed in a myocardial region, the myocardial tissue property sensor including at least a portion configured to penetrate into tissue in the myocardial region and a contractility sensor being an accelerometer array including a plurality of accelerometers configured to sense acceleration signals from a plurality of myocardial locations in the myocardial region, the acceleration signals each indicative of a tissue property; and a tissue property analyzer including an input to receive the acceleration signals and an output indicative of whether the acceleration signals indicate infarcted tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for localizing myocardial infarction (MI) in a heart having a cardiac wall, the method comprising:
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placing a myocardial tissue property sensor in a myocardial region on the cardiac wall, the myocardial tissue property sensor including at least a portion configured to penetrate into tissue in the myocardial region and an accelerometer array including a plurality of accelerometers; sensing a plurality of acceleration signals indicative of myocardial contractility from a plurality of myocardial locations in the myocardial region using the accelerometer array; and detecting infarcted tissue on the cardiac wall based on the plurality of acceleration signals. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A system for localizing myocardial infarction (MI), the system comprising:
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a catheter including a distal end configured for myocardial placement; a myocardial contractility sensor adapted to sense signals indicative of myocardial contractility from myocardial locations constituting a myocardial region and including at least a portion configured to penetrate into tissue in the myocardial region, the myocardial contractility sensor incorporated into the distal end of the catheter and adapted to be placed in a plurality of the myocardial regions, one at a time, over at least a portion of a cardiac wall, the myocardial contractility sensor configured to sense signals each indicative of the myocardial contractility for one of the plurality of myocardial locations in one of the plurality of myocardial regions; a tissue property analyzer receiving the sensed signals, the tissue property analyzer including a tissue property mapping module adapted to produce a contractility map presenting a measure of the myocardial contractility over the at least the portion of the cardiac wall based on the sensed signals. - View Dependent Claims (17, 18, 19, 20)
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Specification