15 results about "Cardiac pacing" patented technology

A method of cardiac treatment to provides a synergetic therapeutic effect of lowering the hyperactive sympathetic response observed in microvascular disease (MVD) and heart failure (HF) pathologies and promoting cardiac remodeling of left ventricular hypertrophy in a patient. The method may include ablating renal sympathetic nerves of the patient to reduce sympathetic afferent and efferent activity to the kidney, thereby reducing blood pressure, delivering cardiac pacing to induce remodeling of hypertrophy of the left ventricle of the patient's heart, and stimulating a vagus nerve of the patient to induce an anti-inflammatory reflex in the patient's heart. The method may include ablating renal sympathetic nerves of the patient to reduce sympathetic afferent and efferent activity to the kidney, thereby reducing blood pressure, and stimulating carotid baroreceptors of the patient to downregulates sympathetic tone and upregulates parasympathetic tone.

This application relates to the field of implantable medical device technology, and discloses a temporary cardiac pacing system and method. The temporary cardiac pacing system includes: an external control device and a temporary cardiac pacing device; the temporary cardiac pacing device includes an energy supply unit and a magnetic control unit; the energy supply unit and the magnetic control unit are connected via a connector; the external control device is used to generate pulsed magnetic field signals; the magnetic control unit is used to use the pulsed magnetic field signals to pulse-conduct the circuitry of the temporary cardiac pacing device, thereby controlling the energy supply unit to pulse-discharge, thereby stimulating the myocardium to induce contraction and achieve cardiac pacing. Because magnetic fields have the unique physical advantage of penetrating biological tissue almost without damage, using magnetic field signals to penetrate biological tissue can avoid damage to the biological tissue, thereby reducing the safety risks of the temporary cardiac pacing device.

A system includes an implantable medical device (IMD) and processing circuitry. The IMD includes sensing circuitry configured to sense cardiac electrical signals of a patient, and therapy delivery circuitry configured to deliver demand cardiac pacing to a heart of the patient based on the cardiac electrical signals. The processing circuitry is configured to: determine, for each of a plurality of time units, based on the cardiac electrical signals and the delivery of demand cardiac pacing during the time units, a plurality of metrics indicative of a need for continued delivery of demand cardiac pacing to the heart of the patient. The plurality of metrics includes a metric associated with a duration of one or more pacing episodes during the time unit. The processing circuitry is further configured to generate a graphical representation of the plurality of metrics of the plurality of time units for presentation to a user.

A medical device configured to sense a first instance of a physiological signal indicative of respiration of a patient during a first period of time; deliver cardiac pacing pulses to the patient via a plurality of electrodes; predict, by a machine learning model for a second period of time, a second instance of the physiological signal based on the first instance of the physiological signal; adjust a rate of cardiac pacing based on the predicted second instance of the physiological signal; and adjust the rate of cardiac pacing based on a third instance of the physiological signal in response to one of a duration of time since a most recent update of the machine learning model meeting a time threshold, a change in baseline heart rate of the patient meeting a change threshold, a change in patient activity meeting a change threshold.

A medical device system includes a sensing circuit configured to sense at least one cardiac electrical signal and a therapy delivery circuit configured to deliver pacing pulses. The medical device system includes control circuitry configured to determine evoked response signal features from the at least one cardiac electrical signal sensed following pacing pulses delivered by the therapy delivery circuit. The control circuitry is configured to determine an adaptive threshold based on a center metric of a first portion of the evoked response signal features. The control circuitry may be further configured to detect an evoked response morphology change in response to a second portion of the evoked response signal features being outside the adaptive threshold from the center metric.

A medical device is configured to set a post-atrial time interval in response to an atrial event and generate an event time signal in response to a ventricular electrical signal crossing an R-wave sensing threshold during the post-atrial time interval. The device accumulates oversensing evidence in response to the event time signal and adjusts a ventricular sensing control parameter based on the accumulated oversensing evidence in some examples.

The invention discloses a magnetic-drive navigation multi-stiffness sheathing canal for a cardiac pacing operation. A multi-rigidity distribution sheathing canal structure is adopted, a plurality of magnetic units are arranged on the small-rigidity section at the far end, effective constraint on a sheathing canal deflection area and a deflection form is achieved, the rigidity of the sheathing canal is gradually increased from the far end to the near end, the magnetic drive effect is mainly concentrated on the small-rigidity section, and the middle-rigidity section and the large-rigidity section are kept relatively stable; wide-range swinging of the whole sheathing canal is avoided; meanwhile, a plurality of magnetic units are arranged in the small-rigidity section, so that magnetic drive control is changed from a single-point effect to a multi-point synergistic effect distributed in the axial direction, a small curvature radius is formed, and therefore fine control suitable for a narrow space of the heart is achieved. According to the magnetic drive sheath tube, the deflection range and the action area are effectively limited while the large deflection capacity is guaranteed, the risk of damage to surrounding tissue is reduced, and the safety and adaptability of the magnetic drive sheath tube in a cardiac pacing operation are remarkably improved.

A medical device is configured to determine tachyarrhythmia evidence in a cardiac signal segment received from a cardiac electrical signal sensed during a pacing escape interval started to schedule a pending cardiac pacing pulse. The medical device may delay the pending cardiac pacing pulse in response to determining the tachyarrhythmia evidence during the pacing escape interval.

The utility model relates to heart pacing technical field especially is a kind of heart pacing monitoring device, including detection organism, the outer surface one side of detection organism is fixedly installed with patch structure, the patch structure includes first connecting line;The one end of first connecting line is fixedly installed with spring line, the one end of spring line is fixedly installed with second connecting line, through patch structure, when monitoring work is carried out, by tearing off dustproof sheet after making electrode patch stick in the chest cavity of sick child, subsequently two clamps are clamped at the connecting place of second connecting line and electrode patch, by positioning pin fixed subsequently by pulling elastic band to outside, make it maximum limit spread to opposite two directions, subsequently second patch is tightly attached on the skin of sick child, thus can improve the fixing strength of device by two layer pasting mode, thus reaches the purpose that patch is not easily influenced by children to lead to peeling, improves the monitoring stability of device.

A first device comprises an accelerometer and is configured to deliver cardiac pacing to a patient, and sense physiological activity of the patient sensed via the accelerometer. A second device is configured to sense the physiological activity of the patient via a plurality of electrodes. Processing circuitry is configured to compare the sensing of the physiological activity by the first device to the sensing of the physiological activity by the second device and based on the comparison, control whether the first device delivers the cardiac pacing based on the sensing of the physiological activity via the accelerometer.

A system includes sensing circuitry configured to sense a physiological signal of a patient via one or more electrodes disposed on an implantable medical lead coupled to a medical device of the system; and processing circuitry configured to: determine that one or more features of the physiological signal are indicative of potential right ventricular (RV) lead dislodgement; determine a patient risk level of the patient based on one or more of: an underlying heart rate of the patient; or user input indicative of the patient risk level; and based on the determination that one or more features of the physiological signal are indicative of potential RV lead dislodgement and the patient risk level meeting a criterion, send an emergency alert to a user.

A medical device is configured to determine tachyarrhythmia evidence in a cardiac signal segment received from a cardiac electrical signal sensed during a pacing escape interval started to schedule a pending cardiac pacing pulse. The medical device may delay the pending cardiac pacing pulse in response to determining the tachyarrhythmia evidence during the pacing escape interval.

Systems and methods for ambulatory cardiac pacing are provided. A method may include providing an implantable medical device and a medical lead and inserting the medical lead into a vein of a patient; and securing the holder adjacent the insertion site of the medical lead. The method may include selecting, for execution by an implantable medical device, a pacing algorithm from a first pacing algorithm configured to provide intermittent pacing support and a second pacing algorithm configured to provide continuous pacing support.

A cardiac pacing threshold acquisition method, a pacing control method and apparatus, and a medical device. The acquisition method comprises: in a pacing test phase, using an initial pacing frequency and an initial pacing output to perform pacing on a patient; under the pacing operation, measuring first response information of the ventricle of a patient to the initial pacing frequency; according to whether an R wave is present in the first response information, adjusting pulse voltage amplitude or pulse width of the initial pacing frequency so as to obtain a cardiac pacing threshold corresponding to the patient.

An example apparatus includes an elongate housing, first and second electrodes, and signal generating circuitry. The housing may be implanted within a single first chamber of a heart. The first electrode extends distally from the distal end of the elongate housing. A distal end of the first electrode is penetrable into wall tissue of a second chamber of the heart. The second electrode extending from the distal end of the elongate housing is configured to flexibly remain in contact with the wall tissue of the first chamber without being penetrated by the second electrode through the wall tissue of the first chamber. A signal generating circuit may be within the elongate housing and coupled to the first electrode and the second electrode. The signal generation circuitry may deliver cardiac pacing to the second chamber via the first electrode and cardiac pacing to the first chamber via the second electrode.