10 results about "Cardiac resynchronization" patented technology

In some examples, controlling delivery of CRT includes controlling an implantable medical device to deliver ventricular pacing according to a sequence of different values of a CRT parameter and acquire first and second electrograms from respective first and second electrode vectors. For each value of the CRT parameter, a value of a comparison metric of a first activation interval between a first fiducial point of a cardiac cycle detected in the first electrogram and an occurrence of a second fiducial point of the cardiac cycle and a second activation interval between the first fiducial point and the occurrence of the second fiducial point detected in the second electrogram can be determined. A target value of the comparison metric can be identified and an updated value of the CRT parameter determined based on the target value. The system can then control the IMD to deliver ventricular pacing at the updated value of the CRT parameter.

Illustrative devices and methods may provide cardiac resynchronization therapy (CRT) that utilizes instantaneous CRT settings to mitigate right ventricular load during implementation of the CRT. The aggressiveness of the instantaneous CRT setting may be increased until the target CRT setting is reached. Further, the transient CRT setting may reduce aggressiveness in response to ventricular degradation.

The application discloses a patient classification method and device based on magnetic resonance parameters, equipment, medium, the method comprises the following steps: obtaining the target magnetic resonance parameter of the target patient; the target magnetic resonance parameter is selected from a plurality of preset magnetic resonance parameters based on the cardiac resynchronization label of the sample patient and the true result of the occurrence of the preset endpoint event; the target magnetic resonance parameter comprises a myocardial strain parameter, a gadolinium contrast agent delayed enhancement result and a left ventricular torsion parameter; the target classification tree is input into the target patient, and the target patient is classified by using the target classification tree, and the target classification result corresponding to the target patient is obtained; the target classification tree is obtained by extending the preset classification tree based on the cut-off value of each target magnetic resonance parameter and the influence of meeting each cut-off value on cardiac resynchronization; and the target classification result is output. The application can classify patients more accurately.

In some instances, a computing device can determine information corresponding to a data structure and indicating delays associated with atrial leads, left ventricular (LV) leads, and right ventricular (RV) leads, based on one or more input variables. The computing device can determine multiple personalized characteristics based on the information corresponding to the data structure. The computing device can receive multiple second sets of electrical measurements from multiple measuring electrodes, based on the multiple personalized characteristics, indicating a second electrical signal applied to the patient's heart. The computing device can use a first set of electrical measurements (e.g., raw measurements) and the multiple second sets of electrical measurements to determine a cardiac resynchronization index (CRI) value. The computing device can generate a graphical representation based on the populated data structure and display the graphical representation.

VfA cardiac therapy uses an implantable medical device or system. The implantable medical device includes a tissue-piercing electrode implanted in the basal and / or septal region of the left ventricular myocardium of the patient's heart from the triangle of Koch region of the right atrium through the right atrial endocardium and central fibrous body. The device may include a right atrial electrode, a right atrial motion detector, or both. The device may be implanted completely within the patient's heart or may use one or more leads to implant electrodes in the patient's heart. The device may be used to provide cardiac therapy, including single or multiple chamber pacing, atrioventricular synchronous pacing, asynchronous pacing, triggered pacing, cardiac resynchronization pacing, or tachycardia-related therapy. A separate medical device may be used to provide some functionality for cardiac therapy, such as sensing, pacing, or shock therapy.

The invention relates to a cardiac assist system comprising: - an intraventricularly implantable cardiac pump, - a processing unit, - at least one lead intended to be placed on an external wall of the heart. The processing unit includes a cardiac pump management function, a pacing function, and / or a defibrillation function. The processing unit is configured to: - perform cardiographic impedance measurements between said at least one lead and a metallic part of the cardiac pump in order to determine the following hemodynamic parameters: - a cardiac electromechanical delay from the cardiographic impedance measurements, - a blood filling time in the heart from the cardiographic impedance measurements, - a blood ejection time from the heart from the cardiographic impedance measurements, and - a change in right ventricular and / or left ventricular volume over time.Figure for the abridged version: Fig. 1.

The present invention provides a device for monitoring the operation of leads of an implantable active cardiac device, particularly an implantable automatic defibrillator or cardiac resynchronization defibrillator. [Solution] The present invention relates to a device comprising: a parameter determination device for determining the values ​​of a plurality of parameters that characterize a read; and a processing unit configured to determine a representative value of at least one of the plurality of parameters that characterize the read based on at least two different time scales, wherein the processing unit is further configured to compare a so-called analytical value of at least one of the plurality of parameters that characterize the read with a representative value of the parameter.

Multiple external electrodes are used to monitor cardiac electrical activity from the patient's tissues. One or more cardiac measurements of the patient are generated based on the monitored electrical activity. If the patient has right bundle branch block, the one or more cardiac measurements are used based on a first global synchrony measure to determine whether the patient is a candidate for a cardiac resynchronization therapy (CRT) device. If the patient does not have right bundle branch block, the one or more cardiac measurements are used based on a second global synchrony measure to determine whether the patient is a candidate for a cardiac resynchronization therapy (CRT) device.

Electrical medical therapy systems, devices, and methods can employ “electrodes” that are galvanically isolated from target biologic tissue. An electric field can be generated in the biologic tissue via such electrically insulated and galvanically isolated electrodes. Further the electric field can be directionally varied, such as to form a Rotating Electric Field (REF), such that it can impact biological cells from different directions. Directional variation of the electric field can be obtain using a set of three (triad) or more electrodes, or multiple such sets or triads, and applying respective phase-delayed time-varying electric signals to corresponding individual electrodes in the triad or other set of galvanically isolated electrodes. Medical electrical REF therapies can include, among other things, at least one of cardioversion, defibrillation, pacing or other cardiac resynchronization, ablation, cautery, vessel sealing, or thermal sterilization.