A system for lead integrity monitoring includes an implantable medical device (IMD) having a housing enclosing a control circuit; and a lead, having a first sensor. The lead is coupled to the housing and electrically coupled to the control circuit. The system also includes at least one processing device configured to identify a first lead failure alert based on a first set of information; obtain a second set of information generated by a second sensor; perform an evaluation of the first set of information in the context of the second set of information; and confirm or cancel the first lead failure alert based on the evaluation.

A cardiac rhythm management system includes at least one sensing component configured to obtain a first physiological parameter signal, an indication of a cardiac response to a stimulation therapy, and temporal information corresponding to the first physiological parameter signal and the cardiac response; and at least one processor configured to: receive the first physiological parameter signal, the indication of the cardiac response, and the temporal information; and to classify the cardiac response into a first cardiac response class to generate a classified cardiac response. The at least one processor also is configured to determine a correlation, based on the temporal information, between the first physiological parameter signal and the classified cardiac response.

An apparatus comprises a cardiac signal sensing circuit configured for coupling electrically to a plurality of electrodes and to sense intrinsic cardiac activation at three or more locations within a subject's body using the electrodes; a stimulus circuit configured for coupling to the plurality of electrodes; a signal processing circuit electrically coupled to the cardiac signal sensing circuit and configured to determine a baseline intrinsic activation vector according to the sensed intrinsic cardiac activation; and a control circuit electrically coupled to the cardiac signal sensing circuit and stimulus circuit and configured to: initiate delivery of electrical pacing therapy using initial pacing parameters determined according to the baseline intrinsic activation vector; initiate sensing of a paced activation vector; and adjust one or more pacing therapy parameters according to the paced activation vector.

An implantable medical device for generating electrical stimulations, wherein the medical device is embodied to generate and emit, during a first stimulation phase, at least one first stimulation that has a first amplitude by means of energy from an energy storage element, and wherein the medical device is embodied, during a second stimulation phase following the first stimulation phase, to generate and emit at least one second stimulation that has a second amplitude by means of energy from the energy storage element, wherein the energy storage element is charged at least prior to the generation of the at least one first stimulation and after the generation of the at least one first stimulation, and wherein the medical device is embodied not to completely discharge the energy storage element by generating the at least one first stimulation. The invention furthermore relates to a method for controlling such a device.

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 apparatus and method for characterizing a region of interest (ROI) including measuring position and orientation data within the ROI; and generating a geometric data set to include one or more of: length, bifurcation location, angle and curvature characteristics of the ROI. Also, sequentially taking an image of a tool within the ROI; comparing tool dimensions with ROI dimensions; and estimating diameter, length, take-off angle, and/or tortuosity characteristics based on the comparisons.

A method for detecting a stimulus pulse by using two or more electrical signals derived from a living body, the method comprising the following steps: (a) for each electrical signal, digitizing the signal with an analog-to-digital converter to produce a sampled signal S.sub.k; (b) for each signal S.sub.k at a sample time t.sub.i, computing a primary difference Δ.sub.kp(t.sub.i)=abs[S.sub.k(t.sub.i)−S.sub.k(t.sub.i−p)]; (c) determining the minimum value of all of the computed differences, such minimum being a detector output D(t.sub.i); (d) comparing the detector output D(t.sub.i) with a detection threshold; and (e) indicating that a stimulus pulse has been detected when the detector output D(t.sub.i) is above the detection threshold.

A medical system including processing circuitry configured to operably couple to an imaging device configured to generate an image of an apparatus within a heart of a patient. The apparatus may be configured to establish conduction system pacing (CSP) of the heart using the electrode. The processing circuitry is configured to receive image data representative of the generated image from the imaging device and generate an output readable by a clinician indicating a likelihood of successful conduction system pacing based on electrode position data indicative of a position of the electrode within the heart. The processing circuitry is configured to determine the likelihood of success using a machine learning algorithm trained with a training data set indicative of successful electrode placements within an anatomical heart.

The present technology is generally directed to medical implants, such as stimulation assemblies for stimulating heart tissue. In some embodiments, a stimulation assembly includes a body, circuitry positioned at least partially within the body, an electrode coupled to the body, and a hook mechanism coupled to the body. The stimulation assembly can be implanted at cardiac tissue of a patient such that the electrode electrically contacts the tissue. The circuitry can be configured to receive acoustic energy and convert the acoustic energy to electrical energy, and the electrode can deliver the electrical energy to the tissue to stimulate the tissue. The hook mechanism can be configured to engage the tissue to pull the tissue and the electrode toward and into engagement with one another.

System and methods for energy adaptive communications between medical devices are disclosed. In one example, a medical device includes a communication module configured to deliver a plurality of pulses to tissue of a patient, where each pulse has an amount of energy. A control module operatively coupled to the communication module, may be configured to, for each delivered pulse, determine whether the delivered pulse produces an unwanted stimulation of the patient and to change the amount of energy of the plurality of pulses over time so as to identify an amount of energy that corresponds to an unwanted stimulation threshold for the pulses. The control module may then set a maximum energy value for communication pulses that is below the unwanted stimulation threshold, and may deliver communication pulses below the maximum energy value during communication with another medical device.