24 results about "Cardiac pace" patented technology

A medical system configured to deliver a plurality of pacing signals to a heart of patient. In examples, the medical system is configured to provide at least first pacing signal to cause or assist in causing a first cardiac cycle of the heart and a second pacing signal to cause and / or assist in causing a second cardiac cycle of the heart. The medical system the medical system includes processing circuitry configured to control an interval separating the first pacing signal and the second pacing signal to cause the second pacing signal to be subsequent to a diastole indicator of the first cardiac cycle.

The present invention is related to an extracardiac temporary pacemaker designed for cardiac pacing, particularly for high-grade atrioventricular block and prolonged sinus pauses. The device integrates a pacemaker unit with battery within a transcutaneous patch, featuring thin, needle-like electrodes that penetrate the intercostal muscles to reach the epicardial surface of the heart. The design allows for rapid, significantly reducing the risk of complications associated with traditional intravascular pacemakers and providing a quick, safe, and more efficient solution for temporary cardiac pacing.

A medical device is configured to deliver His-Purkinje pacing pulses according to multiple settings of a pacing control parameter and determine an electromechanical time delay from a ventricular electrical event to a fiducial point of the pressure signal for each of the pacing control parameter settings. The medical device may be configured to select an operating pacing control parameter from the pacing control parameter settings based on a determined electromechanical time delay being less than a threshold interval. The medical device may deliver pacing pulses to the His-Purkinje conduction system according to the selected operating pacing control parameter.

The present disclosure pertains to cardiac pacing methods and systems, and, more particularly, to cardiac resynchronization therapy (CRT). In particular, the present disclosure pertains to determining whether a patient is experiencing atrial fibrillation (AF). If the patient is experiencing AF, the efficacy of CRT is determined. A signal is sensed in response to a ventricular pacing stimulus. Through signal processing, a number of features are parsed from the signal and a determination is made as to whether the ventricular pacing stimulus evoked a response from the ventricle.

The utility model provides an in-vitro temporary cardiac pacing electrode fixing device, which relates to the technical field of medical devices and comprises a pacemaker main body, an electrode wire and a fixing component, the electrode wire and the fixing component are arranged at one end of the pacemaker main body, and the fixing component is arranged at the bottom of the pacemaker main body and comprises a first mounting seat mounted at the bottom of the pacemaker main body. A sleeve is arranged at the bottom of the first mounting seat, a fixing block is fixedly connected to one end, close to the first mounting seat, of the sleeve, a sliding block is slidably connected to one end, away from the fixing block, of the sleeve, an electrode plate is arranged at one end, away from the pacemaker body, of the electrode wire, and a connecting piece is arranged on the side face of the protective shell and connected with the side face of the pacemaker body through the connecting piece. When the electrode wire winding device is used, the electrode wire is firstly placed in the inner cavity of the protective shell, then the rotary knob is manually twisted clockwise, and therefore the electrode wire can be wound, and a patient can be conveniently examined and nursed.

Cardiac events that are classified as ventricular events following an atrial event can be reclassified as negligible events using the exemplary apparatus and methods described herein. For example, a cardiac signaling event is classified as a ventricular event within a time window following an atrial event. This negligible event will not be unintentionally used to influence cardiac pacing therapy, including, for example, ventricular sense-response pacing.

The utility model provides a cardiac pacing device, which comprises a first electrode part, a second electrode part, a first electrode lead, a second electrode lead, an adapter and a pacemaker, and is characterized in that the first electrode part is used for being embedded into subcutaneous tissue or being attached to skin; the second electrode part is opposite to the first electrode part in polarity and is used for being inserted into the heart for pacing the heart; the first electrode part is connected with the first output end of the adapter through a first electrode wire, the second electrode part is connected with the second output end of the adapter through a second electrode wire, the pacemaker is connected with the input end of the adapter, and pulse current is provided for the first electrode part and the second electrode part through the adapter, the first electrode wire and the second electrode wire. The second electrode part can stimulate the heart and carry out pacing on the heart; the first electrode part is not easy to separate from the skin, and the stability of electric pulse circulation can be enhanced; and the adapter and the pacemaker can be repeatedly used, so that the resource consumption is reduced, and the use cost is reduced.

The present application relates to the technical field of cardiac pacing electrode, in particular to a telescopic cardiac pacing electrode, which comprises a pulse pacemaker and an electrode lead, the electrode lead comprises an insertion end, a connecting sleeve, a conductive core wire and an electrode end, the insertion end, the connecting sleeve and the electrode end are sequentially fixedly connected, the insertion end is insertedly matched with the pulse pacemaker, the connecting sleeve is internally provided with the conductive core wire, the two ends of the conductive core wire are respectively connected with the insertion end and the electrode end, and the pulse pacemaker generates a pulse electric signal which is transmitted to the inside of an organ through the electrode end; in the present application, the telescopic members and the fixing members are staggered in the subcutaneous section, the initial length is the shortest, the spacing of the fixing members anchored in the subcutaneous tissue is increased with the growth of the patient's trunk, the telescopic members are axially stretched, the length adjustment range covers the entire growth period from childhood to adulthood, the risk of electrode lead tightness, electrode displacement or breakage is fundamentally eliminated, and secondary surgery is avoided.

The invention is entitled "Detecting and mapping phrenic nerve through pacing." The invention relates to an apparatus comprising an interface and a processor. The interface is configured to receive one or more magnetic localization signals from one or more position sensors coupled to one or more body surface patches attached to a body of a patient, the magnetic localization signals being indicative of respective positions of the position sensors. The processor is configured to (i) detect an unintentional stimulation of a phrenic nerve of the patient, the unintentional stimulation occurring due to cardiac pacing applied by an intracardiac electrode in a heart of the patient, (ii) estimate, based on the magnetic localization signals, a motion of one or more of the body surface patches occurring during the detected stimulation of the phrenic nerve, (iii) estimate, based on the estimated motion of the body surface patches, a distance between the pacing electrode and the phrenic nerve, and (iv) send an output derived from the estimated distance to an output device.

An implantable medical device (IMD) comprises a plurality of deep tines configured to be advanced into a septum of a heart of a patient in different directions that are not parallel to a longitudinal axis of the implantable medical device, wherein each deep tine of the plurality of deep tines is configured to deliver cardiac pacing to cardiac tissue distal to a chamber of the heart in which the IMD is implanted, and one or more shallow electrodes engageable with the septum, wherein the one or more shallow electrodes are configured to deliver cardiac pacing to the chamber of the heart in which the IMD is implanted.

Disclosed are a pacing control method, a pacing control apparatus, and a medical device. The pacing control method comprises: obtaining an actual heart rate of a patient; and when the actual heart rate meets a preset low heart rate condition, performing cardiac pacing on the patient by using a preset pacing frequency, the preset low heart rate condition being used for representing that the patient is in a life-critical state. The method takes the patient in the life-critical state where the heart rate is severely too slow or even cardiac arrest occurs as an object needing pacing support, and achieves the effect of timely and effectively pacing to support the life of the patient and the effect of avoiding, to a great extent, unnecessary pacing for the patient and the pain of the patient caused by pacing stimulation, especially cannot trigger pacing to occasional bradycardia, non-severe bradycardia, or transient arrest.

Implantable cardiac pacing systems and methods for providing substernal pacing are described. In one example, a cardiac pacing system includes a pacemaker implanted in a patient and an implantable medical electrical lead. The implantable medical electrical lead includes an elongated lead body having a proximal end and a distal portion, a connector configured to couple to the pacemaker at the proximal end of the elongated lead body, and one or more electrodes along the distal portion of the elongated lead body, wherein the distal portion of the elongated lead body of the lead is implanted substantially within an anterior mediastinum of the patient and the pacemaker is configured to deliver pacing pulses to a heart of the patient.

A delivery system and methods for achieving orthogonal implantation of a cardiac pacing lead into a target cardiac tissue. The delivery system comprises an elongated delivery sheath containing a cardiac pacing lead and an elongated stylet, wherein the cardiac pacing lead and the elongated stylet are independently advanceable within the sheath. The distal end of the elongated stylet comprises a first electrode configured to provisionally anchor into the target cardiac tissue at a shallow depth of about 1-3 millimeters. With the stylet anchored, the delivery sheath is manipulated to achieve an approximately orthogonal orientation relative to the target cardiac tissue by pushing forward to correct an acute approach angle, pulling back to correct an obtuse angle, applying torque to correct a tilted plane of approach, or a combination thereof. Once orthogonal orientation is achieved, the cardiac pacing lead is deployed at a position adjacent to the distal end of the elongated stylet, and the stylet and sheath are withdrawn.

A temporary cardiac pacing system includes a temporary cardiac pacing wire having a distal portion and a proximal portion connected to one another via a releasable electrical connection. An electrode of the distal portion is configured to be implanted in a cardiac tissue. The proximal portion is configured to extend through a skin to an exterior of a patient body to be coupled to an external pacemaker device. The releasable electrical connection is configured to release when subject to an energy exceeding a predetermined threshold value such that the proximal portion is detachable from the distal portion and removable from the patient body with negligible force.

Techniques are disclosed for adjusting event detection parameters used for sensing mechanical motion data of a heart of a patient for use in cardiac pacing therapy. For example, processing circuitry receives, from a user, an input specifying one or more event detection parameters defining mechanical motion sensing of a heart of a patient by one or more motion sensors of an implantable medical device (IMD). The processing circuitry controls the IMD to perform mechanical motion sensing of the heart of the patient in accordance with the one or more event detection parameters. The processing circuitry obtains mechanical motion data of the heart of the patient sensed in accordance with the one or more event detection parameters. The processing circuitry controls the IMD to deliver cardiac pacing therapy based on the mechanical motion data of the heart of the patient sensed in accordance with the one or more event detection parameters.

A medical device system includes an implantable medical device (IMD) including: sensing circuitry configured to sense one or more physiological signals, the one or more physiological signals being indicative of respiration and heart rate of a patient over a first period of time; and therapy delivery circuitry configured to deliver cardiac pacing pulses to a heart of the patient via a plurality of electrodes; and processing circuitry configured to: determine a baseline respiratory sinus arrhythmia (RSA) amplitude based on the one or more physiological signals; determine a periodicity metric based on the one or more physiological signals; and control the therapy delivery circuitry to adjust a rate of the cardiac pacing based on the one or more physiological signals in response to a determination that the baseline RSA meets a baseline RSA threshold and a determination that the periodicity metric meets a periodicity threshold.

An implantable medical device is configured to control a therapy module to couple a capacitor array including a plurality of capacitors to a plurality of extravascular electrodes, and to control the therapy module to deliver a composite pacing pulse to a heart of a patient via the plurality of extravascular electrodes by sequentially discharging at least a portion of the plurality of capacitors to generate a series of at least two individual pulses that define the composite pacing pulse.

A novel delivery system for implantation of a cardiac pacing lead comprising an elongated delivery sheath sized to accept the cardiac pacing lead inside thereof and an electrically-active elongated stylet positioned along the cardiac pacing lead and having a first distal electrode configured to provide a first electrical connection to the proximal end of the elongated stylet. The implantation method includes a step of pre-checking a first position in the cardiac tissue by temporarily confirming the ability to deliver the pacing therapy at that position using the first distal electrode of the elongated stylet. If the first position is determined to be acceptable, the cardiac pacing lead is implanted at that position. Otherwise, the delivery system is moved to another position without any significant trauma to the cardiac tissue at the first position.

The embodiment of the invention provides a cardiac pace-making mode, a cardiac pace-making electrode wire for realizing the mode and a pace-making control method, and belongs to the technical field of cardiac pace-making. The cardiac pacing mode is mainly characterized in that the lead is fixed on the pericardial tissue instead of being embedded or sewn on the myocardium. The cardiac pacing electrode wire is composed of a heart fixing assembly, a signal transmission assembly and an electrode assembly. According to the pace-making control method, pace-making parameter combinations including pace-making voltage, pace-making current, pace-making pulse width and pace-making electrode polarity combinations are automatically adjusted. According to the embodiment of the invention, on the premise of meeting pace-making requirements, damage to myocardium and surrounding tissues thereof can be reduced.

The invention disclosed here relates in general to the field of medical devices. In particular, to devices and methods for improving the clinical outcome of patients suffering from cardiac dysrhythmias without cardiac arrest. This method and / or device integrates mechanical, pneumatic, acoustic and / or electrophysiologic capabilities with electrical countershock or pacing capabilities such that the probability of successful cardioversion or pacing is increased. The sequence, forces, and electrical properties of the subsystems can be computer controlled and adjusted in response to biomarker inputs.

This invention, entitled "Patient-Safe Electromechanical Switching for Pacing Using a Catheter with Multiple Electrodes," discloses a pacing system comprising a signal generator and an electromechanical switch. The signal generator is configured to generate a pacing signal. The electromechanical switch has multiple outputs configured to be coupled to multiple electrodes inserted into a patient's heart, each output configured to deliver the pacing signal to a corresponding electrode. The electromechanical switch is configured to route the pacing signal to only a single selected output at any given time to pace the heart using only that single selected electrode.

The application discloses a parameter automatic optimization pacing frequency self-adaptive adjusting device and a cardiac pacing device, which comprises an acceleration signal acquisition module, a motion amount evaluation and statistics module, a target heart rate calculation and statistics module, a pacing frequency adjusting and statistics module and a parameter automatic optimization module; the target heart rate value is determined through the motion amount evaluation value, the pacing frequency value at the next moment is determined through the size relation between the target heart rate value and the actual heart rate value and the selection of the time-pacing frequency rising / falling curve, the pacing related parameters are automatically optimized and adjusted, so that the program control setting of the frequency self-adaptive adjusting function is simplified, the function always works in the best parameter state, and the daily life quality is improved; after the daily life state changes, the pacing related parameters are also automatically optimized and adjusted, so that the needs of different dynamic changes can be met; after the upper and lower limit motion amounts are automatically optimized, the motion amount-target heart rate curve can adopt multiple adjustment strategies, and the personalized needs of different patients can be met.

A medical device system delivers ventricular pacing pulses as conduction system pacing (CSP) pulses in at least one example. The medical device system senses at least one cardiac electrical signal and obtains at least one post-pace T-wave from the at least one cardiac electrical signal sensed following a delivered CSP pulse. The medical device system may determine at least one T-wave match metric between the at least one post-pace T-wave and at least one T-wave template and determine that effective CSP criteria corresponding to capture of at least a portion of a cardiac conduction system are not met based on the at least one T-wave match metric.