| 摘要 |
A method and apparatus for locating a catheter adjacent to a pacemaker node of the heart. The placement of a catheter tip just before SA heart pacemaker node is a common and desired procedure in medicine, with the most serious complication being its accidental advancement of the beyond this point placing its tip into the heart, with often fatal complications. The catheter tip location just before SA heart pacemaker node is desired because is most often the safest and optimal location. The catheter described in the present invention is placed by a physician within a patients body circulatory vessel and advanced towards the heart SA pacemaker node, using traditional medical procedures. From the distal tip of the catheter the endogenous electrical activity from the SA pacemaker node of the heart is monitored and transmitted via at least one insulated transmission line located within the catheter to an electronic catheter monitoring system located outside the body. As the catheter is advanced its tip moves within the patient's circulatory vessel. Simultaneously, the electronic catheter monitoring system monitors the natural pacemaker node potentials, obtained at the tip of the catheter, which increase as the node is approached and decrease as the node is passed. The electronic catheter monitoring system display indicates these monitored changes to the physician advancing the catheter. The information provided by the electronic catheter monitoring system is used by the physician to guide catheter placement and confirm its location at the desired location outside the heart before the SA node.
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