Method for mapping a heart using catheters having ultrasonic position sensors
First Claim
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1. A method for mapping a heart comprising the steps of:
- inserting a mapping catheter, having a tip and an ultrasonic position sensor located at the tip, into the heart;
inserting at least one reference catheter having an ultrasonic position sensor into the heart;
placing the tip of the mapping catheter on a surface of the heart at a plurality of points in time of a cardiac cycle;
determining the position of the mapping catheter relative to the at least one reference catheter using the ultrasonic position sensors by making a geometric snapshot of the heart during each point in time of the cardiac cycle; and
mapping the surface of the heart with the mapping catheter and making a map comprised of each geometric snapshot.
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Abstract
A method for mapping a heart comprises the steps of inserting a mapping catheter having an ultrasonic position sensor into the heart. At least one reference catheter having an ultrasonic position sensor is also inserted into the heart. The position of the mapping catheter is determined relative to the at least one reference catheter and a portion of the heart is mapped with the mapping catheter. Additionally, the at least one reference catheter may be provided outside of the heart.
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Citations
28 Claims
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1. A method for mapping a heart comprising the steps of:
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inserting a mapping catheter, having a tip and an ultrasonic position sensor located at the tip, into the heart; inserting at least one reference catheter having an ultrasonic position sensor into the heart; placing the tip of the mapping catheter on a surface of the heart at a plurality of points in time of a cardiac cycle; determining the position of the mapping catheter relative to the at least one reference catheter using the ultrasonic position sensors by making a geometric snapshot of the heart during each point in time of the cardiac cycle; and mapping the surface of the heart with the mapping catheter and making a map comprised of each geometric snapshot. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for mapping a heart comprising the steps of:
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inserting a mapping catheter, having a tip and an ultrasonic position sensor located at the tip, into the heart; inserting at least one reference catheter having an ultrasonic position sensor outside of the heart; placing the tip of the mapping catheter on a surface of the heart at a plurality of points in time of a cardiac cycle; determining the position of the mapping catheter relative to the at least one reference catheter using the ultrasonic position sensors by making a geometric snapshot of the heart during each point in time of the cardiac cycle; and mapping the surface of the heart with the mapping catheter and making a map comprised of each geometric snapshot. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for mapping a heart comprising the steps of:
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(a) inserting a mapping catheter, having a tip and an ultrasonic position sensor located at the tip, into the heart; (b) inserting at least one reference catheter having an ultrasonic position sensor into the heart; (c) bringing the tip of the mapping catheter into contact with a wall of the heart at a location at a point in time of a cardiac cycle; (d) determining a position of the tip of the mapping catheter at the location using the ultrasonic position sensors and making a geometric snapshot of the wall of the heart; (e) moving the tip of the mapping catheter to a second location at another point in time of the cardiac cycle and making a second geometric snapshot of the wall of the heart; and (f) making a map of the wall of the heart based on the geometric snapshots by repeating steps (d)–
(e). - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A method for mapping a heart comprising the steps of:
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(a) inserting a mapping catheter, having a tip and an ultrasonic position sensor located at the tip, into the heart; (b) inserting at least one reference catheter having an ultrasonic position sensor outside of the heart; (c) bringing the tip of the mapping catheter into contact with a wall of the heart at a location at a point in time of a cardiac cycle; (d) determining a position of the tip of the mapping catheter at the location using the ultrasonic position sensors and making a geometric snapshot of the wall of the heart; (e) moving the tip of the mapping catheter to a second location at another point in time of the cardiac cycle and making a second geometric snapshot of the wall of the heart; and (f) making a map of the wall of the heart based on the geometric snapshots by repeating steps (d)–
(e). - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification