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Cycle length variability in nonsustained ventricular tachycardia

  • US 5,277,190 A
  • Filed: 04/07/1992
  • Issued: 01/11/1994
  • Est. Priority Date: 04/07/1992
  • Status: Expired due to Fees
First Claim
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1. A method for determining the suitability of a person for extended electrophysiologic testing, comprising:

  • monitoring the heartbeat of the person for an extended period of time with a heart monitoring device;

    measuring and recording heart beat cycles in the person during at least one episode of nonsustained ventricular tachycardia;

    determining a cycle length variability value for each recorded episode of nonsustained ventricular tachycardia wherein the step of determining a cycle length variability value further comprises;

    measuring the length of each cycle which occurs during the recorded episode of nonsustained ventricular tachycardia,calculating the differences in length between consecutive cycles in the episode, anddetermining the average of the differences for the episode; and

    comparing at least one determined cycle length variability value to a predetermined electrophysiologic testing threshold number in a range from 35 to 45 milliseconds.

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