| 摘要 |
There is provided a pacemaker lead for use in a dual chamber pacemaker system, wherein the single lead provides for ventricular pacing and atrial sensing. The lead has at least two floating bipoles positioned for placement in the atrium. A first whole-ring bipole is positioned a distance from the distal end so as to be positioned in the lower atrium of an average patient when the distal end is in position for ventricular pacing, and a second split-ring bipole is placed on the lead proximal from the first bipole so as to be positioned in the upper atrium of the normal patient. The method thus comprises positioning a floating whole-ring bipole in the lower atrium, and/or positioning a floating split-ring bipole in the upper atrium. The pair of bipoles so placed provide for atrial sensing with a high degree of ventricular far-field rejection, enabling VDD pacing and also monitoring of P-wave direction and conduction duration.
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