Supraventricular tachy sensing vector

Abstract

A system includes a pulse generator including a can electrode and a lead couplable to the pulse generator, the lead including a distal coil electrode and a proximal coil electrode, wherein both of the coil electrodes are electrically uncoupled from the can electrode such that a unipolar sensing vector is provided between at least one of the coil electrodes and the can electrode.

1 . A system comprising:
 a pulse generator including a can electrode; and   a lead couplable to the pulse generator, the lead including a distal coil electrode and a proximal coil electrode, wherein both of the coil electrodes are electrically uncoupled from the can electrode such that a unipolar sensing vector is provided between at least one of the coil electrodes and the can electrode.   
   
   
       2 . The system of  claim 1 , wherein the sensing vector is provided between the distal electrode and the can electrode. 
   
   
       3 . The system of  claim 1 , wherein the sensing vector is provided between the proximal electrode and the can electrode. 
   
   
       4 . The system of  claim 1 , wherein a second sensing vector is provided between the distal coil electrode and the proximal coil electrode. 
   
   
       5 . The system of  claim 1 , wherein the pulse generator is configured such that the unipolar sensing vector can alternate between the distal coil electrode and the can electrode and the proximal electrode and the can electrode. 
   
   
       6 . The system of  claim 1 , wherein the pulse generator is configured such that a first unipolar sensing vector between the distal coil electrode and the can electrode and a second unipolar sensing vector between the proximal electrode and the can electrode occur simultaneously. 
   
   
       7 . The system of  claim 1 , wherein the pulse generator is configured to distinguish between VT and SVT using the unipolar sensing vector. 
   
   
       8 . A system comprising:
 a pulse generator including a can electrode; and   a lead couplable to the pulse generator, the lead including a distal coil electrode and a proximal coil electrode, and further including a tip pacing/sensing electrode and a ring electrode, wherein the proximal coil electrode and the distal coil electrode are electrically uncoupled from the can electrode such that a unipolar sensing vector is provided between the distal electrode and the can electrode.   
   
   
       9 . The system of  claim 8 , wherein a second unipolar sensing vector is provided between the proximal electrode and the can electrode. 
   
   
       10 . The system of  claim 8 , wherein a third sensing vector is provided between the distal coil electrode and the proximal coil electrode. 
   
   
       11 . The system of  claim 8 , wherein the lead is configured such that the proximal coil electrode is implantable in the right atrium and the distal coil electrode is implantable in the right ventricle. 
   
   
       12 . The system of  claim 8 , wherein the pulse generator is configured to distinguish between VT and SVT using the unipolar sensing vector. 
   
   
       13 . An apparatus comprising:
 a pulse generator including a housing can electrode;   electronics located within the pulse generator; and   an electrical connection between the housing can electrode and the electronics;   wherein the electronics and electrical connection are configured such that when a lead is coupled to the pulse generator, a distal coil electrode on the lead is electrically uncoupled from the housing can electrode by the electrical pathway and a proximal coil electrode on the lead is electrically uncoupled from the housing can electrode, such that a unipolar sensing vector is provided between at least one of the coil electrodes and the can electrode.   
   
   
       14 . The apparatus of  claim 13 , wherein the pulse generator is configured such that the unipolar sensing vector is provided between the distal coil electrode and the can electrode. 
   
   
       15 . The apparatus of  claim 13 , wherein the pulse generator is configured such that the unipolar sensing vector is provided between the proximal electrode and the can electrode. 
   
   
       16 . The apparatus of  claim 13 , wherein a second sensing vector is provided between the distal coil electrode and the proximal coil electrode. 
   
   
       17 . The apparatus of  claim 13 , wherein the pulse generator is configured to distinguish between VT and SVT using the unipolar sensing vector. 
   
   
       18 . A method comprising:
 providing a pulse generator including a can electrode; and   coupling a lead to the pulse generator, the lead including at least one proximal coil electrode which is electrically isolated from the can electrode, and the lead including a distal coil electrode which is electrically isolated from the can electrode;   implanting the lead such that the proximal coil electrode is located in the right atrium and the distal coil electrode is located in the right ventricle; and   sensing heart signals using a unipolar sensing vector between at least one of the coil electrode and the can electrode.   
   
   
       19 . The method of  claim 18 , wherein sensing heart signals includes differentiating between SVT signals and VT signals. 
   
   
       20 . The method of  claim 18 , wherein the lead includes one or more distal pacing and/or sensing electrodes.