Device and method for identifying cardiac events
AssigneePacesetter, Inc.
InventorsHanbiao Wang, Bonian Dai, Iman Ahmadi, Erik Brockman
Life of this patent
Estimating the term…
Abstract
An implantable medical device includes leads having electrodes that are positioned within a heart. The electrodes sense signals derived from the heart that include waveform segments. The device includes a timing module that determines when the waveform segments cross a threshold and measures time intervals between at least two threshold crossings by the waveform segments. The device also includes event identification module that compares the time intervals to a predetermined pattern associated with a cardiac event. The event identification module identifies the cardiac event based on the time intervals and the predetermined pattern.
Claims17
An implantable medical device comprising:
- one or more leads comprising electrodes configured to be positioned within a heart, the electrodes capable of sensing signals derived from the heart, the signals comprising waveform segments that comprise a portion of a cardiac cycle;
- a timing module to determine when each of the waveform segments crosses a plurality of thresholds and to measure a time interval between at least two threshold crossings for each of the waveform segments, wherein the plurality of thresholds have different amplitude levels;
- and
- an event identification module to compare the time intervals to a predetermined pattern associated with a cardiac event, the event identification module to identify the cardiac event based on the time intervals and the predetermined pattern, wherein the cardiac event is selected from the group consisting of a QRS complex and a T-wave.
A method for identifying cardiac events, the method comprising:
- sensing signals derived from a heart that include waveform segments that comprise a portion of a cardiac cycle;
- determining when each of the waveform segments crosses a plurality of thresholds, wherein the plurality of thresholds have different amplitude levels;
- measuring a time interval between at least two threshold crossings for each of the waveform segments;
- comparing the time intervals to a predetermined pattern associated with a cardiac event;
- and
- identifying the cardiac event based on the time intervals and the predetermined pattern, wherein the cardiac event is selected from the group consisting of a QRS complex and a T-wave.
Dependencies are inferred from the claim text.