Method and apparatus for determining the coronary sinus vein branch accessed by a coronary sinus lead
First Claim
1. A method for determining a position of a first electrode placed within a left ventricle area of a heart, the method comprising the steps of:
- detecting a first depolarization event within the heart;
sensing, with the first electrode, a second depolarization event within the heart;
measuring a first interval between the first depolarization event and the second depolarization event; and
determining from at least the first interval whether the first electrode has a lateral/posterior position or an anterior position within the left ventricle.
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Accused Products
Abstract
Systems and methods for determining the coronary sinus vein branch location of a left ventricle electrode are disclosed. The systems and methods involve detecting the occurrence of electrical events within the patient'"'"'s heart including sensing one or more of the electrical events with the electrode and then analyzing the electrical events to determine the electrode'"'"'s position. The determination of electrode position may be used to automatically adjust operating parameters of a VRT device. Furthermore, the determination of electrode position may be made in real-time during installation of the electrode and a visual indication of the electrode position may be provided on a display screen.
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Citations
25 Claims
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1. A method for determining a position of a first electrode placed within a left ventricle area of a heart, the method comprising the steps of:
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detecting a first depolarization event within the heart;
sensing, with the first electrode, a second depolarization event within the heart;
measuring a first interval between the first depolarization event and the second depolarization event; and
determining from at least the first interval whether the first electrode has a lateral/posterior position or an anterior position within the left ventricle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
detecting a third depolarization event within the heart;
measuring a second interval between the third depolarization event and the second depolarization event; and
wherein the step of determining whether the first electrode has a lateral/posterior position or an anterior position comprises computing a probability value for the first electrode position based at least on the first interval and the second interval and determining the electrode position from at least the probability value.
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8. The method of claim 7, wherein the first depolarization event occurs in an atrial area of the heart prior to the second and third depolarization events, the second depolarization event is a QRS complex peak in a left ventricle area of the heart, and the third depolarization event is a QRS complex peak in a right ventricle area of the heart occurring before or after the second depolarization event.
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9. The method of claim 7, wherein the first depolarization event occurs in an atrial area of the heart prior to the second and third depolarization events, the second depolarization event is a QRS complex peak in a left ventricle area of the heart, and the third depolarization event is an onset of a QRS complex in the left ventricle area of the heart occurring before the second depolarization event.
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10. The method of claim 7, wherein the first depolarization event is an onset of a QRS complex in a left ventricle area of the heart occurring prior to the second depolarization event, the second depolarization event is a QRS complex peak in the left ventricle area of the heart, and the third depolarization event is a QRS complex peak in a right ventricle area of the heart occurring before or after the second depolarization event.
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11. The method of claim 1, wherein the step of determining the lead position comprises the step of:
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computing a probability (P) of the lead position being in an anterior position according to the equation wherein dA is an approximation of a probability density function of the electrode being in the anterior position, dL is an approximation of a probability density function of the electrode being in a lateral/posterior position, Q* RL is the first interval in milliseconds, and wherein
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12. The method of claim 1, wherein the step of determining the lead position comprises the step of:
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computing a probability (P) of the lead position being in an anterior position according to the equation wherein dA is an approximation of a probability density function of the electrode being in the anterior position, dL is an approximation of a probability density function of the electrode being in a lateral/posterior position, RR RL is the first interval in milliseconds, and wherein
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13. A method for determining a position of an electrode within a left ventricle of a heart, the method comprising the steps of:
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detecting a first depolarization event within the heart;
sensing, with the electrode, a second depolarization event within the heart;
measuring a first interval between the first depolarization event and the second depolarization event;
detecting a third depolarization event within the heart;
measuring a second interval between the third depolarization event and the second depolarization event; and
determining the electrode position based on an evaluation of the first and the second intervals. - View Dependent Claims (14, 15, 16, 17)
computing a probability (P) of the lead position being in an anterior position according to the equation wherein dA is an approximation of a probability density function of the electrode being in the anterior position, dL is an approximation of a probability density function of the electrode being in a lateral/posterior position, RR RL is the first interval in milliseconds, Q* RL is the second interval in milliseconds, and wherein
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18. A system for determining the position of a first electrode in a left ventricle area of a patient'"'"'s heart, comprising:
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the first electrode located within the left ventricle area;
one or more detection devices for detecting at least first and second electrical events in the patient'"'"'s heart, one of the one or more detection devices being electrically connected to the first electrode and detecting the second electrical event in the left ventricle area; and
a processing device in electrical communication with the one or more detection devices, the processing device configured to calculate a first interval between the first and second electrical events and determine the position of the electrode based at least upon the first interval. - View Dependent Claims (19, 20, 21)
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22. A system for determining the position of a first electrode in a left ventricle area of a patient'"'"'s heart, comprising:
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means for detecting a first electrical event within the patient'"'"'s heart;
means for detecting a second electrical event occurring at the first electrode;
means for computing a first interval between the first and second electrical events; and
means for determining whether the first electrode has an anterior or lateral/posterior position within the left ventricle based at least on the first interval between the first and second electrical events. - View Dependent Claims (23, 24, 25)
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Specification