42 results about "Pace rate" patented technology

A cardiac rhythm management system includes an atrial pacing preference (APP) filter for promoting atrial pacing. The APP filter includes an infinite impulse response (IIR) or other filter that controls the timing of delivery of atrial pacing pulses. The atrial pacing pulses are delivered at an APP-indicated pacing rate that is typically at a small amount above the intrinsic atrial heart rate. For sensed beats, the APP indicated rate is increased until it becomes slightly faster than the intrinsic atrial heart rate. The APP-indicated pacing rate is then gradually decreased to search for the underlying intrinsic atrial heart rate. Then, after a sensed atrial beat, the APP filter again increases the pacing rate until it becomes faster than the intrinsic atrial rate by a small amount. As a result, most atrial heart beats are paced, rather than sensed. This decreases the likelihood of the occurrence of an atrial tachyarrhythima, such as atrial fibrillation. The decreased likelihood of atrial tachyarrhythmia, in turn, decreases the likelihood of inducing a ventricular arrhythmia, either as a result of the atrial tachyarrhythmia, or as the result of delivering a defibrillation shock to treat the atrial tachyarrhythmia.

Disclosed is a system and method that allows users to customize audible and visible signals, such as music or video, to maintain a pre-determined or specified pace or to achieve a new pace in repetitive motion activities such as, but not limited to, running, walking, swimming, cycling, aerobics, and the like. Other applications of the system and method include, but are not limited to, enhancing the results of medical rehabilitation programs, physical therapy, weight loss programs, disc jockey services, and industries or manufacturing settings where repetitive motion is common and where audible cues designed to help users maintain a consistent pace are useful.

A cardiac rhythm management system provides an increase in pacing rate as a combination of responses to three characteristics of a relative-temperature signal: a dip, a positive slope, and a positive magnitude. The relative-temperature signal is the difference between a short-term and a long-term temperature average. A dip produces a limited and temporary rate increase having a first proportionality. A positive slope produces a rate increase with a second proportionality. A positive magnitude produces a rate increase with a third proportionality. The dip response seeds the slope response to provide a seamless and immediate rate transition after a dip. The cardiac rhythm management system limits and filters the sum of the rate increases to provide a sensor indicated rate, which is used to stimulate the heart.

In a system that provides bi-atrial and / or bi-ventricular pacing, the system adjusts an interval between paces delivered to the atria, and / or an interval between paces delivered to the ventricles, as a function of heart rate. By adjusting the interval between paces as a function of heart rate, the atria and / or ventricles may be activated in a more synchronous and more hemodynamically efficient fashion.

The present invention teaches that cognitive skills may be trained by methods of increasing loading, distraction and pace while a trainee is carrying out a cognitive skill related repetitive mental task. Loading may comprise addition of a second repetitive mental task, distraction may be visual, auditory, kinesthetic and may increase in the power of the distraction, and pace may be increased until a maximum pace is achieved. Patterned, continuous, intermittent, and combined loading, distraction and pace changes may be used, as well as patterned feedback. The result is that the student learns to process the stimuli—using the cognitive skills—at increased levels of efficiency and speed.

Disclosed is a system and method that allows users to customize audible and visible signals, such as music or video, to maintain a pre-determined or specified pace or to achieve a new pace in repetitive motion activities such as, but not limited to, running, walking, swimming, cycling, aerobics, and the like. Other applications of the system and method include, but are not limited to, enhancing the results of medical rehabilitation programs, physical therapy, weight loss programs, disc jockey services, and industries or manufacturing settings where repetitive motion is common and where audible cues designed to help users maintain a consistent pace are useful. Other features of the invention include providing target- or pace-specific advertisements, and broadcasting target- or pace-specific information about athletes.

The present invention relates to an automatic speed-controlled treadmill using a pressure sensor array and a method of operating the same. The automatic speed-controlled treadmill includes a walking belt, a pressure sensor array including pressure sensors for detecting loads of the exerciser's feet and outputting the detected loads of the feet as load detection signals, a pace speed status storage unit for storing a pace speed and variation in pace speed of the exerciser, and a control unit provided with an algorithm for calculating a pace speed of the exerciser using the load detection signals, calculating a difference between a previous pace speed and a current pace speed as the variation in pace speed, calculating the exercise center of the exerciser, and proportionally accelerating / decelerating a driving speed of the walking belt in consideration of the variation in pace speed and the exercise center.

An implantable medical device (IMD) performs periodic testing of a patient to determine ischemia threshold information. At selected times while the patient is at rest, the IMD increases the pacing rate over time until it receives feedback either from the patient or from an ischemia sensor. The IMD determines the threshold based upon the pacing rate at the time when the feedback was received. The threshold information can be used to adjust the upper pacing rate that can be used during rate adaptive pacing, to determine the effects of drug therapy, and to provide a general indication of the state of coronary artery disease in the patient. The periodic increase of pacing rate to the ischemic zone also provides a preconditioning of the myocardium to allow the patient greater exercise benefit without angina.

The invention provides methods and apparatus for determining in a non-tracking pacing mode (e.g., DDI / R, VVI / R) whether a ventricular pacing stimulus is capturing a paced ventricle, including some or all of the following aspects. For example, increasing a ventricular pacing rate a nominal amount to an overdrive pacing rate higher than a most recent heart rate and evaluating a conduction interval from a first pacing ventricle to a second sensing ventricle and then continuing to monitor the underlying rate to ensure that a threshold testing pacing rate will not exceed a predetermined minimum interval and providing pacing stimulation to the first ventricle and sensing the second ventricle to determine whether the pacing stimulation to the first ventricle was one of sub-threshold and supra-threshold. The methods and apparatus are especially useful in conjunction with ensuring actual delivery of a ventricular pacing regime (e.g., cardiac resynchronization therapy or “CRT”).

Disclosed is a system and method that allows users to customize audible and visible signals, such as music or video, to maintain a pre-determined or specified pace or to achieve a new pace in repetitive motion activities such as, but not limited to, running, walking, swimming, cycling, aerobics, and the like. Other applications of the system and method include, but are not limited to, enhancing the results of medical rehabilitation programs, physical therapy, weight loss programs, disc jockey services, and industries or manufacturing settings where repetitive motion is common and where audible cues designed to help users maintain a consistent pace are useful. Other features of the invention include providing target- or pace-specific advertisements, and broadcasting target- or pace-specific information about athletes.

The present invention includes a system and method for monitoring a user's pace and providing an indication of the user's average pace in conjunction with performing an activity. The method according to one embodiment of the present invention includes monitoring a user's pace relating to the performance of the activity and calculating pace data relating the user. In response to a first signal, the method stores the pace data and in response to a second signal retrieves the pace data. The method then calculates an assistance pace for the user over a defined time interval and transmits an output signal reflecting the assistance pace based the pace data, such as in the example of a golf club assisting in the swinging pace of the golf club.

An improved apparatus and method for enhanced training based on variable pacing includes the division of a training course into a series of segments. Each of the segments has an associated length and duration. An associated pacing unit is programmed to output an audio and / or tactile and / or a visual signal for a pre-determined pace to be maintained for each of the segments for a given event. By repetitively using the pacing unit during training sessions, an athlete can learn the appropriate pace to maximize performance for a given event.

Cardiac devices and methods that select pacing rates for automatic threshold tests based on a patient's hemodynamic need. A sensor-indicated pacing rate corresponding to a patient's hemodynamic need is determined. A test pacing rate is selected from either the sensor-indicated rate or another rate. Capture threshold testing is performed using the selected pacing rate.

Techniques are provided for programming a rate-responsive pacemaker or other implantable cardiac stimulation device capable of rate-responsive pacing. In one embodiment, an external programmer is configured to allow a physician to program the pacemaker with a smooth curvilinear rate-responsive pacing function having whatever shape the physician deems optimal for the patient, rather than being limited to generating a linear or bi-linear rate-responsive pacing functions as with many conventional techniques. The rate-responsive pacing function may specify, for example, pacing rates as a function of orthostatic sensor values, activity sensor values, minute ventilation sensor values, vasovagal syncope sensor values or paced depolarization integral sensor values. If several sensors are provided in the pacemaker, smooth rate-responsive pacing functions may be separately generated for use with each sensor.

A system and method for avoiding short-interval paces during pacing mode transitions. The method may be particularly useful in switching to or from a biventricular pacing mode.

The invention discloses a heart rate monitoring method. The method is applied to a terminal. The method comprises the steps of collecting step counting data of a user through a motion sensor, and determining the step speed of the user according to the collected step counting data; starting a heart rate sensor to collect heart rate data of the user under the condition that the step speed of the user exceeds a step speed threshold value; and determining a current heart rate of the user according to collected heart rate data after the heart rate sensor collects the heart rate data of the user, and feeding back the heart rate and a motion monitoring result to the user. According to the method and the device, the heart rate of the user can be monitored based on a step counting function according to demands in a running process, and more friendly motion experience is provided for the user.

A system and method are disclosed and described for changing the meter of songs being played on a replay device. This system and method may be implemented in a replay device, such as a MP3 player, for use by an exerciser so that the exerciser may maintain a predetermined pace during an exercise period based on the meter of the songs being played. The system and method also provide an ability to vary the pace during the exercise period to maintain a physiological condition at a substantially constant level

A system and method for avoiding short-interval paces during pacing mode transitions. The method may be particularly useful in switching to or from a biventricular pacing mode.

A programmer for cardiac implantable medical devices, including an accelerated test mode of the operating parameters. The programmer includes a user interface (10) that is used to define the tests to be performed on the implant and display the results thereof. These tests includes: ventricular and atrial sensing sensitivity, ventricular and atrial lead impedance, and ventricular and atrial capture threshold. Each test step involves (i) a predetermined setting of the operating mode, pacing rate and atrio-ventricular delay of the implantable device, (ii) collection of the operating data of the implantable device according said predetermined settings, and (iii) processing and display of thus collected data. There further exists one test step of time compression along which at least some of the ventricular and atrial tests for a same parameter are executed simultaneously during a common step, preferably the tests of sensing sensitivity and lead impedance. The user interface allows for a preliminary selection of the tests to be performed, and the programmer is operated to execute these tests, linked in sequence, without any intervention by the user.

A cardiac pacemaker device is in signal communication with a patient interface unit (PIU). The patient has the option of controlling various functions of the pacemaker via the PIU. In one embodiment, the pacemaker has an automatic means to detect a need for a change in pace rate, as well as initiate the calculated change. However, before or when initially increasing the pace rate the pacemaker device transmits an alert signal to the PIU. As the PIU alerts the patient that it believes they are engaging in exercise requiring a faster pacing rate, the patient can recognize a false signal and has the opportunity to transmit an override signal back to the pacemaker device (via the PIU), canceling the intended increase in pace. In other embodiments, the patient can use the PIU to notify the pacemaker that they are about to exercise, and optionally allow the pacemaker to work in automated mode or override the automated mode within reasonable limits to set a pacing rate commensurate with their physical activity.

The efficacy of cardiac resynchronization therapy applied to a patient's heart by an implantable device are improved by obtaining acute hemodynamic feedback during implantation of a pacing device. A first and a second transducer are temporarily placed proximate to a portion of the patient's heart during device implant, and a distance between the transducers is monitored as the therapy is applied. A parameter (e.g. lead location, biventricular pacing, pacing rate, or the like) of the cardiac therapy is adjusted in response to the distance between the transducers until a desired result is obtained, after which the first and second transducers can be removed from the patient.

The invention provides an ejection-period-impedance-index-based adaptive method of a pacing rate of a cardiac pacemaker. The method comprises: step one, collecting a heart chamber impedance waveform; step two, carrying out peak point and valley point detection on the collected waveform; step three, determining whether a wrong waveform occurs at each cardiac cycle measurement result obtained by the step 2; if so, abandoning the data and collecting an intracardiac impedance waveform again; and if not, carrying out a step four; step four, according to the detected peak point and the valley point, carrying out base line adjustment on the impedance waveform value measured in the cardiac cycle; step five, carrying out integration processing on the impedance waveform after base line adjustment and solving an ejection period impedance index; step six, determining whether counted continuous working hours reach 24 hours; if so, carrying out a step seven and adjusting an upper limit and a lower limit of the ejection period impedance index and an automatic reaction coefficient; and if not, skipping over the step seven and carryint out a step eight to determine a current pacing frequency.