| Patent application number | Description | Published |
|---|
| 20080275516 | METHOD AND APPARATUS FOR DETECTING ARRHYTHMIAS IN A MEDICAL DEVICE - A method and apparatus of updating a sensing parameter in a medical device that includes sensing cardiac signals, determining intervals in response to the sensed cardiac signals, determining interval patterns associated with the determined intervals, and updating the sensing parameter in response to the determined interval patterns. | 11-06-2008 |
| 20080275517 | METHOD AND APPARATUS FOR DETECTING ARRHYTHMIAS IN A MEDICAL DEVICE - A method and apparatus for determining oversensing in a medical device that includes sensing cardiac signals, determining an oversensing characteristic associated with cardiac signals sensed during a predetermined sensing window, identifying oversensing in response to the oversensing characteristic, determining, in response to oversensing being identified, an adjusting characteristic associated with cardiac signals sensed during the predetermined sensing window, and updating a sensing parameter in response to the determined adjusting characteristic. | 11-06-2008 |
| 20080275518 | METHOD AND APPARATUS FOR DETECTING ARRHYTHMIAS IN A MEDICAL DEVICE - A method and apparatus for determining oversensing of cardiac signals that includes a housing containing electronic circuitry, an electrode coupled to the electronic circuitry to sense cardiac signals, and a processor, positioned within the housing, to determine an oversensing characteristic associated with the cardiac signals sensed over a predetermined sensing window, and to identify oversensing in response to the determined oversensing characteristic. | 11-06-2008 |
| 20080275519 | METHOD AND APPARATUS FOR DETECTING ARRHYTHMIAS IN A MEDICAL DEVICE - A method and apparatus for adjusting a sensing parameter in a medical device that includes a sensing electrode sensing cardiac signals, a processor to determine an adjusting characteristic associated with the cardiac signals sensed over a predetermined sensing window, and a control unit to update the sensing parameter in response to the determined adjusting characteristic. | 11-06-2008 |
| 20100030093 | PERIODIC BEAT DETECTION TO DETECT ARTIFACTS IN A CARDIAC ELECTROGRAM - Techniques for determining whether artifacts are present in a cardiac electrogram are described. According to one example, a medical device senses a cardiac electrogram via electrodes. The medical device determines a derivative, e.g., a second order derivative, the electrogram. The medical device detects beats within the derivative, e.g., by comparing a rectified version of the derivative to one or more thresholds determined based on a maximum of the rectified derivative. The medical device determines whether the beats are periodic, and determines whether artifacts are present in the cardiac electrogram based on the determination of whether the beats are periodic. The medical device may further determine whether tachyarrhythmia is present and/or whether the cardiac rhythm of the patient is treatable based on the determination of whether the beats are periodic. For example, the medical device may determine that an electrogram is not treatable when the beats are periodic. | 02-04-2010 |
| 20100113889 | CARDIAC RISK STRATIFICATION UTILIZING BAROREFLEX SENSITIVITY MEASUREMENT - A monitoring or therapy system may obtain a baroreflex sensitivity (BRS) measurement via an implantable medical device (IMD). The monitoring or therapy system then may generate a risk stratification indicator based on the BRS measurement. In some examples, the IMD generates the risk stratification indicator, while in other examples, an external computing device, such as a programmer, generates the risk stratification indicator. The monitoring or therapy system also may obtain at least one of a heart rate variability (HRV) measurement and a non-sustained ventricular tachycardia (NSVT) indicator via the IMD, and may generate the risk stratification indicator based on the BRS measurement and one or both of the HRV measurement and the NSVT indicator. In some examples, the monitoring or therapy system may generate an instruction, indicator, or alert based on the risk stratification indicator. The indicator may indicate that the patient is a candidate for an implantable therapy device. | 05-06-2010 |
| 20100204597 | METHOD AND APPARATUS FOR DETECTING ARRHYTHMIAS IN A MEDICAL DEVICE - A method of detecting a cardiac event that includes sensing cardiac signals from a plurality of electrodes, determining rates of change of the sensed cardiac signals, and determining a range of the sensed cardiac signals. The sensed cardiac signals are detected as being associated with the cardiac event in response to the determined rates of change and the determined range. | 08-12-2010 |
| 20110137193 | CONTINUOUS MONITORING OF RISK BURDEN FOR SUDDEN CARDIAC DEATH RISK STRATIFICATION - System and method for assessing a likelihood of a patient to experience a cardiac arrhythmia. A biological sensor is configured to sense biological parameters of the patient. A processor is coupled to the biological sensor and is configured to determine the likelihood of the patient experiencing a cardiac arrhythmia based, at least in part, on a combination of the biological parameters, the combination dynamically weighting each of the plurality of biological parameters based on another one of the plurality of biological parameters. | 06-09-2011 |
| 20110245700 | DETECTION OF T-WAVE ALTERNANS PHASE REVERSAL FOR ARRHYTHMIA PREDICTION AND SUDDEN CARDIAC DEATH RISK STRATIFICATION - An implantable medical device and associated method for classifying a patient's risk for arrhythmias by sensing a cardiac electrogram (EGM) signal and selecting a first pair of T-wave signals and a second pair of T-wave signals. A first difference between the two T-wave signals of the first pair is compared to a second difference between the two T-wave signals of the second pair. A T-wave alternans phase reversal is detected in response to comparing the first difference and the second difference, and the patient's arrhythmia risk is classified in response to detecting the phase reversal. | 10-06-2011 |
| 20110301479 | System and Method for Assessing a Likelihood of a Patient to Experience a Future Cardiac Arrhythmia Using Dynamic Changes in a Biological Parameter - System and method for assessing a likelihood of a patient to experience a cardiac arrhythmia using dynamic changes in a biological parameter. A biological sensor is configured to sense a biological parameter of the patient. A processor is coupled to the biological sensor and is configured to determine a dynamic change of the biological parameter and determine the likelihood of the patient experiencing a cardiac arrhythmia based, at least in part, on the dynamic change of the biological parameter. | 12-08-2011 |
| 20110301480 | SYSTEM AND METHOD FOR ASSESSING A LIKELIHOOD OF A PATIENT TO EXPERIENCE A CARDIAC ARRHYTHMIA - Systems and method for assessing a likelihood of a patient having a heart to experience a cardiac arrhythmia. A sensor is configured to detect a premature ventricular contraction of the heart, the premature ventricular contraction being premature relative to a rate of ventricular contractions during a period preceding the premature ventricular contraction. A processor is configured to determine a dispersion of a predetermined number of repolarizations of the heart of the patient occurring following the premature ventricular contraction of the heart if a compensatory pause is detected in conjunction with the premature ventricular contraction, then determine the likelihood of the patient experiencing the cardiac arrhythmia based, at least in part, on the dispersion of the plurality of repolarizations of the heart of the patient. | 12-08-2011 |
