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Bi-chamber cardiac pacing system employing unipolar left heart chamber lead in combination with bipolar right chamber lead

  • US 6,421,564 B1
  • Filed: 11/12/1999
  • Issued: 07/16/2002
  • Est. Priority Date: 11/12/1999
  • Status: Expired due to Term
First Claim
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1. A method of sensing of spontaneous cardiac depolarizations in right and left heart chambers and delivering right or left heart chamber pacing pulse to the right or left heart chamber for improving the hemodynamic efficiency of a sick heart suffering from conduction delays in conducting depolarizations wherein said method comprises the steps of:

  • advancing a unipolar pace/sense lead into a left heart chamber blood vessel to situate a left heart chamber active pace/sense electrode of the unipolar pace/sense lead adjacent to the left heart chamber;

    advancing a bipolar pace/sense lead into the right heart chamber to locate a right heart chamber active pace/sense electrode and indifferent pace/sense electrode in relation to the right heart chamber;

    sensing right heart chamber spontaneous cardiac depolarizations across the right heart chamber active and indifferent pace/sense electrodes and providing a right heart chamber sense event signal;

    timing out a pacing interval from a right heart chamber sense event signal or a previously delivered pacing pulse; and

    upon providing of a right heart chamber sense event signal or upon timing out said pacing escape interval, selectively generating and delivering one of a right heart chamber pacing pulse across said right heart chamber active and indifferent pace/sense electrodes and a left heart chamber pacing pulse along a trans-ventricular pacing path between said left heart chamber active pace/sense electrode and said right heart chamber indifferent pace/sense electrode.

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