| 摘要 |
<p>PURPOSE: A catheter for bipolar mapping an intracardiac potentials and a method for using the catheter are provided to measure a near-field electrical activity at a location in a heart. CONSTITUTION: The catheter(10) comprises an elongated tubular body(12) having a distal region and a circumferential recess along the length of the distal region. A first electrode(36) is mounted on the distal region in close proximity to the circumferential recess. A second electrode(39) is mounted within the circumferential recess. The method further comprises positioning the distal region at the location in the heart so that the first electrode is in direct contact with heart tissue and the second electrode is not in direct contact with heart tissue but is in contact with blood. A first signal is obtained with the first electrode, and a second signal is obtained with the second electrode. The first signal and the second signal are compared to obtain the near-field electrical activity at the location in the heart.</p> |
