| 摘要 |
An apparatus for locating and mapping a catheter in a heart invasive operation, includes a permanent magnet with a north pole face, a permanent magnet with a south pole face, a frame for positioning the magnets on opposite sides of a person's body; first and second motors for revolving the permanent magnets in synchronism and in alignment with each other to create a directional magnetic field that revolves 360 degrees through the person's heart; a catheter for insertion into the heart, the catheter including a first sensor group of three mutually orthogonal sensors at the tip thereof and a second sensor group of three mutually orthogonal sensors in axially spaced relation to the first sensor group, each for detecting the relative strength of the revolving magnetic field; a magnetic field position detector which detects the angular position and speed of movement of the directional magnetic field; a plurality of electrodes spaced along an outer wall thereof for detecting electric signals which run along a wall of the heart; an ablation member at a tip of the catheter for burning out a wall of the heart; and a central processing unit for determining a location of the catheter position in relation to the heart in response to the detected strength of the revolving magnetic field by the first and second sensor groups and the angular position and speed of movement of the directional magnetic field.
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