3 results about "Av interval" patented technology

The invention relates to the technical field of patient recovery evaluation, and discloses a patient recovery evaluation method and system based on an intelligent sensor. In a standard heart pulse simulator environment, the sensor voltage and the reference heart rate are preheated and collected, and static calibration and scale reading are completed. Voltage is collected at intervals during patient monitoring and converted into a heart rate time sequence, and after three-point median filtering, abnormities are eliminated according to the median of the whole section and the absolute deviation of the median; taking a median value from the first batch of steady-state samples as a baseline heart rate, and calculating absolute deviation to construct a deviation sequence; the median of the baseline segment deviation is taken, a threshold value is set in combination with the absolute deviation of the whole segment, and a recovery starting point is recognized through a sliding window; and finally, calculating a deviation accumulation area by using a composite trapezoid method, and generating a quantitative recovery score by combining the maximum deviation and duration normalization.

A system and method are provided for managing atrial-ventricular (AV) delay adjustments. An AV interval is measured that corresponds to an interval between an atrial paced (Ap) event or an atrial sensed (As) event and a sensed ventricular (Vs) event. A candidate AV delay is set based on the AV interval and a bundle branch adjustment (BBA) value. A QRS characteristic of interest (COI) is measured while utilizing the candidate AV delay in connection with delivering a pacing therapy. The BBA value is adjusted and the candidate AV delay is reset based on the BBA value as adjusted. A collection of QRS COIs and corresponding candidate AV delays are obtained and one of the candidate AV delays is selected as a BBA AV delay. The pacing therapy is managed, based on the BBA AV delay.

A method for controlling an adaptive pacing therapy that includes utilizing one or more processors to perform measuring an atrial-ventricular (AV) interval corresponding to an interval between an atrial paced (Ap) event or an atrial sensed (As) event and a sensed ventricular (Vs) event, setting an AV delay based on the AV interval, and measuring an S1 heart sound characteristic of interest (COI) while utilizing the AV delay in connection with delivering a pacing therapy by the IMD. The one or more processors also perform adjusting the AV delay, repeating the measuring, and adjusting to obtain a collection of S1 heart sound COIs and corresponding AV delays, selecting one of the AV delays, that corresponds to a select one of the S1 heart sound COIs, as a resultant AV delay, and managing the pacing therapy, utilized by the IMD, based on the resultant AV delay.