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Method and apparatus for determining atrial lead disclocation and confirming diagnosis of atrial tachyarrhythimias

  • US 5,713,932 A
  • Filed: 10/28/1996
  • Issued: 02/03/1998
  • Est. Priority Date: 10/28/1996
  • Status: Expired due to Term
First Claim
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1. A method of determining the location of the atrial pace/sense electrode(s) of an atrial pace lead in a cardiac stimulation system of the type comprising a timing and control sub-system, an atrial pulse generator coupled with the atrial pace lead for providing atrial pace pulses to the atrial pace lead, a ventricular sense amplifier coupled with a ventricular sense lead having ventricular sense electrode(s) positioned in contact with the ventricle for providing a ventricular sense signal to the timing and control sub-system, the method comprising the steps of operating the timing and control sub-system in:

  • (a) providing a threshold AV delay interval correlated with the AV conduction time of an atrial depolarization wave originating in the atrium and eliciting a responsive ventricular depolarization wave conducted in the ventricular septum;

    (b) operating the atrial pulse generator to generate and apply an atrial pace pulse to the atrial pace electrode(s);

    (c) sensing, through operation of the ventricular sense amplifier, the following ventricular depolarization at the ventricular sense electrode(s) as a ventricular sense event;

    (d) measuring the time interval between the applied atrial pace pulse and the ventricular sense event as a measured AV delay interval;

    (e) comparing the measured AV delay interval to the threshold AV delay interval; and

    (f) determining that the atrial pace electrode(s) is in contact with the right atrium if the measured AV delay interval is longer than the threshold AV delay interval.

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