Device and system for adaptively adjusting pacing frequency

Abstract

The invention provides a device and a system for adaptively adjusting pacing frequency. The device comprises a band-pass filter, an over-threshold value detecting and counting unit, a heart rate adaptation unit and a smooth transition unit, wherein the band-pass filter is used for performing band-pass filtering on an acceleration signal sensed by an acceleration transducer; the over-threshold value detecting and counting unit is used for acquiring an exercise intensity estimated value of a human body based on the filtered acceleration signal; the heart rate adaptation unit is used for acquiring a corresponding target heart rate according to a predefined adaptive curve based on the exercise intensity estimated value, wherein the adaptive curve consists of a sub-usual heart rate section which gradually ascends, a platform-shaped usual heart rate section, a super-usual heart rate section which gradually ascends, and a platform-shaped upper limit heart rate section; and the smooth transition unit is used for updating the pacing frequency by employing an approximation curve according to the current pacing frequency and a target heart rate. By the device and the system, the exercise intensity of the human body can be sensitively captured in real time; and therefore, the target heart rate is rapidly adapted, the pacing frequency is updated, and smooth transition from the current pacing frequency to the target heart rate is realized.

Description

technical field [0001] The invention relates to a device and system for adaptive adjustment of pacing frequency. Background technique [0002] Since the third generation of physiological pacemakers, the adaptive adjustment of pacing frequency has become an essential function of cardiac pacemakers. Pacing frequency adaptive adjustment function is a technology that uses sensors to perceive human body movement and metabolic state to adjust pacing frequency in real time. It can largely compensate for the problem of cardiac chronotropic insufficiency and greatly improve the lives of patients. Quality and exercise tolerance. On the contrary, if this function is not available, the heart activity cannot change with the change of body metabolism due to the lack of cardiac chronotropic function in patients with pacemaker. [0003] The pacing frequency adaptive adjustment function is mainly realized by special sensors and pacing frequency adaptive adjustment algorithm. It senses phy...

AI Technical Summary

Problems solved by technology

Although on the surface, the closed-loop adjustment method is more in line with physiological conditions, but due to the limited types of physiological parameter sensors used in pacemakers with the frequency adaptive adjustment function and the serious hysteresis effect, this closed-loop adjustment method is not currently available. Frequency adaptive regulation function dominates in pacemakers

Images