41 results about "Cardiac pace" patented technology

A method and apparatus for treatment of heart failure by increasing secretion of endogenous naturetic hormones ANP and BNP such as by stimulation of the heart atria. Heart pacing is done at an atrial contraction rate that is increased and can be higher than the ventricular contraction rate. Pacing may include mechanical distension of the right atrial appendage. An implantable device is used to periodically cyclically stretch the walls of the appendage with an implanted balloon.

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.

This disclosure describes techniques for tracking respiration and respirophasic pacing using bioimpedance measurements. In one example, a device includes: therapy delivery circuitry configured to deliver cardiac pacing pulses to a heart of a patient via a plurality of electrodes; sensing circuitry configured to sense a bioimpedance signal of a patient; and processing circuitry configured to: identify a beginning of a current inspiration phase of the patient based on the bioimpedance signal; and control the therapy delivery circuitry to adjust a rate of the cardiac pacing during the current inspiration phase based on the identification of the beginning of the current inspiration phase.

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.

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.

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.

The utility model relates to a heart pace-making structure and a lead-free pacemaker, the heart pace-making structure comprises a flexible battery part, a head part used for being connected with a fixing structure and an electrode installed on the battery part or the head part, the head part is used for bearing a control system, and the electrode is electrically connected with the control system. The battery part is connected to the head part and is used for providing a power supply for the control system, and the battery part has a preassembled state and an unfolded state; in a preassembled state, the battery part is shrunk in the sheath tube; and in the unfolding state, the battery part is unfolded around the head part and is flat as a whole. The pacemaker can be designed to have a larger battery space than a traditional similar product, the service life is longer, the follow-up replacement cost of a patient is reduced, the installation page is more stable, and the risk that the pacemaker shifts or falls off can be effectively reduced.

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.

The present invention relates to an implantation and / or retrieval device for a leadless cardiac pacing device, which may include: a first elongated shaft including a lumen; a second elongated shaft slidably disposed in the lumen of the first elongated shaft; an end cap assembly fixedly attached to a distal end of the first elongated shaft; and a plurality of wires attached to the second elongated shaft and extending distally from the end cap assembly, the plurality of wires being movable relative to the end cap assembly. The plurality of wires are configured to engage a proximal hub of the leadless cardiac pacing device. The plurality of wires form a plurality of wire loops extending distally from the end cap assembly.

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 therapy delivery device configured to deliver cardiac pacing pulses to a heart of a patient via a plurality of electrodes can sense an electrogram (EGM) signal of a patient; identify a prior inspiration phase based on the EGM signal; determine a heart rate of the patient based on the EGM signal; predict a beginning of a subsequent inspiration phase based on the prior inspiration phase; and adjust a rate of the cardiac pacing during the subsequent inspiration phase based on the heart rate and the prior inspiration phase.

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 medical device is configured to receive a cardiac signal and determine a morphology matching score from the cardiac signal and a capture detection morphology template that corresponds to a first type of cardiac pacing capture that includes capture of at least a first portion of the His-Purkinje system. The device is configured to detect a second type of cardiac pacing capture in response to the morphology matching score being less than the first match threshold. The second type of cardiac pacing capture is different than the first type of cardiac pacing capture and may include capture of the ventricular myocardium and / or a second portion of the His-Purkinje system different than the first portion.

This invention discloses a segmented removal device for cardiac pacing electrodes via the inferior vena cava route. It includes an operating handle and a main tube connected to one end of the operating handle, a control component axially slidable inside the main tube and extending to its distal end; a grabbing and cutting assembly installed at the distal end of the main tube, controlled by the control component and a pull rod within the main tube to clamp and cut the cardiac pacing electrode lead; and a lead-grabbing bracket fitted on the outside of the main tube, movable distally and detached from the main tube under external force. The lead-grabbing bracket is an elastic structure with a coiled state and an open state; when fitted on the outside of the main tube, it is in a coiled state, and after detachment, it automatically opens, allowing other objects to pass through. This invention solves the problem that existing pacing electrode removal tools may increase the risk of vascular tearing and myocardial perforation when pulling on cardiac pacing electrodes.

The utility model discloses a cell flow suspension culture device capable of simulating blood flow, which comprises a culture dish filled with a culture medium, and the lower part of the culture dish is connected with a peristaltic pump through a hard conduit; one end of the hard conduit is connected with the bottom of the culture dish, and the other end of the hard conduit is connected with the soft conduit in the peristaltic pump; and a driving motor for controlling the culture medium in the culture dish, the hard guide pipe and the soft guide pipe to circularly flow in a reciprocating manner is mounted on the peristaltic pump. According to the cell flow suspension culture device for simulating blood flow, the principle that cardiac pacing is used as power and the flow velocity of blood vessels is uniformly controlled is combined, the power of the peristaltic pump is used for simulating a cardiac pacing power source, and uniform flow velocity is provided for a culture medium in the culture dish, so that liquid splashing is avoided, and the cell flow suspension culture device is convenient to use. And the method is closer to cell flow suspension culture of blood flow, and can be used for biological characteristic research of target cell fluid dynamics.

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.

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.

The invention relates to the technical field of cardiac pacing electrodes, in particular to a telescopic cardiac pacing electrode which comprises a pulse pacemaker and an electrode wire, the electrode wire comprises an insertion end, a connecting sleeve, a conductive core wire and an electrode end, and the insertion end, the connecting sleeve and the electrode end are fixedly connected in sequence. The insertion end is matched with the pulse pacemaker in an inserted mode, a conductive core wire is arranged in the connecting sleeve, the two ends of the conductive core wire are connected with the insertion end and the electrode end respectively, and pulse electric signals generated by the pulse pacemaker are transmitted to the interior of an organ through the electrode end; the subcutaneous section adopts the staggered layout of the telescopic parts and the fixing parts, the initial length is shortest, the distance between the fixing parts anchored to the subcutaneous tissue is increased along with the growth of the trunk of a patient, the telescopic parts are pulled to axially stretch, the length adjusting range covers the whole growth period from a child to an adult, and the risks of electrode wire tightening, electrode displacement or breakage are fundamentally eliminated; and a secondary operation is avoided.

A medical device is configured to receive cardiac electrical signals and sense ventricular event signals from the cardiac electrical signals. The medical device may start a validation window in response to sensing a ventricular event signal and determine if the ventricular event signal is a valid event signal or an invalid event signal based on processing of a different cardiac electrical signal than the cardiac electrical signal from which the ventricular event signal was sensed.

The device comprises an operating handle and a main pipe connected to one end of the operating handle, and further comprises a control piece which is installed in the main pipe in an axial sliding mode and extends to the far end of the main pipe; the capturing and shearing assembly is installed at the far end of the main pipe and is controlled by a control piece and a pull rod in the main pipe to clamp and cut off a cardiac pacing electrode wire; the main pipe is sleeved with the wire capturing support, the wire capturing support can move towards the far end under the action of external force and is separated from the main pipe, the wire capturing support is of an elastic structure with a curled state and an open state, and when the main pipe is sleeved with the wire capturing support, the wire capturing support is in the curled state; after being separated from the main pipe, the device automatically changes into an open state and allows other objects to pass through. The problem that the risks of vascular tearing and myocardial perforation are possibly increased when an existing pace-making electrode pulling tool pulls a heart pace-making electrode can be solved.

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.