×

Implantable defibrillator with countershock synchronized to P-wave

  • US 6,256,534 B1
  • Filed: 08/11/1998
  • Issued: 07/03/2001
  • Est. Priority Date: 08/11/1998
  • Status: Expired due to Term
First Claim
Patent Images

1. An implantable defibrillator for treating cardiac dysrhythmias in a human patient by delivering electrical countershocks to a plurality of implanted electrodes, the implantable defibrillator comprising:

  • a sealed housing structure constructed of a biocompatible material;

    a battery source of electrical energy contained in the housing;

    a capacitor system operably connected to the battery source to store electrical energy provided by the battery source to generate high voltage electrical countershocks;

    a control system operably connected to the battery source and the capacitor system, including sensing circuitry that senses cardiac signals representative of a heart rate;

    detection circuitry operably connected to the sensing circuitry that evaluates the cardiac signals to detect a ventricular fibrillation; and

    control circuitry operably connected to the detection circuitry and the sensing circuitry that controls the storing and discharge of electric energy in the capacitor system through the plurality of implanted electrodes such that delivery of the electrical energy is synchronized to a predetermined aspect of an atrial portion of the cardiac signals that is a predetermined delay after the occurrence of a P-wave.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×