摘要:
A method and system of detecting phrenic nerve stimulation in a patient that includes detecting an activation event, obtaining a heart sound signal of a patient from an implanted heart sound sensor, determining that an electrical stimulation has been applied to the patient, in response to detecting the activation event, monitoring a portion of the heart sound signal, the portion defined by a predetermined window after the application of the electrical stimulation, and determining whether phrenic nerve stimulation occurred based on the portion of the heart sound signal.
摘要:
The invention disclosed a simulation method of CMP process, comprising: firstly, building a CMP model, and forming a matrix table of line width logarithm-density according to the CMP model, and making each intersection of the matrix table correspond to each CMP result under the corresponding line width and density; secondly, dividing a layout into a plurality of grids, and converting the equivalent line width and density of each grid into the coordinate of line width logarithm-density in the matrix table; thirdly, fitting and calculating preliminary CMP simulation results of each grid according to the coordinate of each grid in the matrix table and the CMP simulation results of its adjacent intersections of the matrix table; then, fitting and computing final CMP simulation results of each grid according to a related weighting factor which considers the impact of adjacent grids for the current grid on the layout; finally, outputting the final CMP simulation results of the whole layout.
摘要:
The present disclosure is directed to the detection of coughs and coughing episodes using acoustic signals. In various examples, an implantable medical device processes an acoustic signal obtained from an acoustic sensor to determine whether a patient has coughed. In some examples, the implantable medical device also performs a cough severity assessment. In some examples, the cough severity assessment may include a determination of the depth of the cough, the duration of the coughing episode, or whether the cough was wet or dry.
摘要:
A method and apparatus for monitoring respiration in a patient sense a cardiac electrical signal and detect signal peaks from the cardiac electrical signal. A peak amplitude waveform is generated from the signal peaks. a first derivative of the peak amplitude waveform is computed. Inspiration pulses are derived from the first derivative signal, and a respiration metric can be computed using the inspiration pulses derived from the cardiac electrical signal.
摘要:
An implantable medical device receives both heart sound and electrogram signals. A processor within the implantable medical device extracts physiologically relevant information from both the heart sound signal and the electrogram signal. Based on the extracted physiologically relevant information a set of pacing parameters is evaluated. In certain examples, the values of the pacing parameters may be changed by the implantable medical device in response to the physiologically relevant information extracted from the heart sound signal and the electrogram signal.
摘要:
A method and device for detecting a cardiac event that includes sensing cardiac electrical signals representative of electrical activity of a heart of a patient, detecting the cardiac event in response to the sensed cardiac signals, determining an indication of signal reliability corresponding to the sensed cardiac signals as being one of a reliable signal and a not reliable signal, and switching operation of the device between a first mode of determining whether the sensed signal is one of treatable and not treatable and a second mode of determining whether the sensed signal is one of treatable and not treatable in response to the determined indication of signal reliability.
摘要:
A method includes storing an electrogram (EGM) template in a memory. The EGM template includes first and second alignment points at first and second peaks of the EGM template, respectively. The method further includes identifying first and second peaks of a cardiac cycle EGM acquired by a medical device and selecting one of the first and second peaks of the cardiac cycle EGM to align with one of the first and second alignment points based on an order in which the first and second peaks of the cardiac cycle EGM occur. Additionally, the method includes aligning the selected one of the first and second peaks with one of the first and second alignment points and determining an amount of similarity between the cardiac cycle EGM and the EGM template after alignment.
摘要:
An implantable medical device and associated method sense cardiac signals for deriving a template representing a known EGM waveform morphology and for classifying an unknown waveform morphology. A boundary of the template, offset from the template, is computed and compared to an unknown waveform morphology for classifying the unknown waveform morphology.
摘要:
A method of delivering phrenic nerve stimulation in a medical device system that includes detecting an activation event, delivering phrenic nerve stimulation therapy in response to the detected activation event, sensing a heart sound signal, in response to the delivered phrenic nerve stimulation therapy, monitoring a portion of the sensed heart sound signal, the portion defined by a predetermined window ocurring after the delivered phrenic nerve stimulation therapy, and determining whether the delivered phrenic nerve stimulation therapy was successful in response to the monitoring.
摘要:
A method includes storing an electrogram (EGM) template in a memory. The EGM template includes first and second alignment points at first and second peaks of the EGM template, respectively. The method further includes identifying first and second peaks of a cardiac cycle EGM acquired by a medical device and selecting one of the first and second peaks of the cardiac cycle EGM to align with one of the first and second alignment points based on an order in which the first and second peaks of the cardiac cycle EGM occur. Additionally, the method includes aligning the selected one of the first and second peaks with one of the first and second alignment points and determining an amount of similarity between the cardiac cycle EGM and the EGM template after alignment.