| US 7,463,926 B1 | ||
| Automatic signal amplitude measurement system in the setting of abnormal rhythms | ||
| Paul A. Levine, Santa Clarita, Calif. (US); and Arndt Godau, Los Angeles, Calif. (US) | ||
| Assigned to Pacesetter, Inc., Sylmar, Calif. (US) | ||
| Filed on Jun. 24, 2005, as Appl. No. 11/166,618. | ||
| Int. Cl. A61N 1/37 (2006.01) | ||
| U.S. Cl. 607—28 [607/27; 600/515; 600/516; 600/517; 600/509] | 12 Claims |
| 1. A method of operating an implantable medical device, the method comprising:
i) programming an initial set of sensing parameters including at least one of an amplifier gain and a detection threshold
in the device;
ii) developing a signal indicative of at least one physiological process with the device;
iii) evaluating the signal over time by the device so as to determine a detection pattern of the signal;
iv) characterizing the detection pattern to establish if it comprises a repetition of an irregular complex;
v) if a repetition of an irregular complex is established, automatically self-adjusting at least one of the amplifier gain
lower and the detection threshold higher so as to define a test set of sensing parameters; and
vi) iteratively repeating steps iii) through v) until a change in the characterization of the detection pattern indicates
that the test set of sensing parameters has resulted in undersensing of the physiological parameter;
vii) establishing an effective set of sensing parameters corresponding to the last set of sensing parameters for which undersensing
did not occur.
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