Various configurations of systems that employ leadless electrodes to provide pacing therapy are provided. In one example, a system that provides multiple sites for pacing of myocardium of a heart includes wireless pacing electrode assemblies that are implantable at sites proximate the myocardium using a percutaneous, transluminal, catheter delivery system. Also disclosed are various configurations of such systems, wireless electrode assemblies, and delivery catheters for delivering and implanting the electrode assemblies.

An implantation accessory for an intracardiac capsule includes a catheter with a catheter body and a tubular protection tip disposed at a distal end of the catheter body. The tubular protection tip includes a flexible portion disposed between a base portion structured to couple the tubular protection tip to the catheter body and a cylindrical portion structured to house the intracardiac capsule.

This disclosure relates to a communication amplification device for an implantable capsule, in particular for an autonomous cardiac stimulation capsule. The amplification device comprises a first holding element and a second element configured to hold the implantable capsule. The first holding element is configured to receive the distal end of the capsule and the second holding element is configured to receive the proximal end of the capsule. The first holding element comprises a communication amplification antenna configured to couple to a distal electrode of the capsule.

Electrical sensing/stimulation apparatuses for positioning at least one electrode within body tissue are provided. An electrical sensing/stimulation apparatus may comprise an elongate lead body having at least one internal lumen, at least one sensing/stimulation electrode, a deployable/retractable displacement member that moves or biases at least one electrode towards a prescribed direction by the user, a tissue attachment mechanism for affixing the distal segment of the device to body tissue, and an atraumatic distal lead body termination. In a retracted configuration, the attachment mechanism is positioned substantially within the distal segment of the lead body, and in the deployed configuration, the attachment mechanism extends from the axis of the lead body to engage body tissue.

A medical tool includes a rotation mechanism that further includes a warning feature. The warning feature provides an indication when the rotation mechanism has achieved a number of rotations.

A transcatheter delivery device including a catheter and at least one stabilizer useful for trasnsseptal procedures. The stabilizer includes a shaft connected to an anchor. The anchor has a delivery position in which the anchor is collapsed against the shaft and a deployed position in which the anchor expands to engage a pulmonary vein or atrial appendage to support the catheter within the septal wall as the catheter moves within a left atrium. Various disclosed delivery devices are also configured to ablate tissue proximate the anchor and/or can be disconnected from the delivery device after the procedure to occlude an atrial appendage. Methods of using the disclosed delivery devices and treating a heart are also disclosed.

A leadless pacemaker device for providing an intra-cardiac pacing includes processing circuitry configured to generate ventricular pacing signals for stimulating ventricular activity at a ventricular pacing rate, a first sensor configuration receiving a first sense signal, and a second sensor configuration receiving a second sense signal. The processing circuitry derives, in a first sensing state, atrial events from the first sense signal for controlling the ventricular pacing rate based on the atrial events. The processing circuitry switches, based on at least one switching criterion, from the first sensing state to a second sensing state in which the processing circuitry derives atrial events from the second sense signal. The second sense signal is received by the second sensor configuration for detection of atrial events and the second sensor configuration is a motion sensor or a sound sensor. A method for operating the pacemaker device is also provided.

A lead assembly and associated process include a lead and an integrated feature that facilitates extraction of the lead from the associated body passage. The integrated feature in one embodiment is a sheath received between the associated body passage and received over the lead. The sheath has a first portion extending from adjacent the proximal end to adjacent the distal end of the lead, where the first portion has an inner surface facing with the lead outer surface and the first portion having an outer surface facing radially outward from the lead outer surface. A second portion of the sheath extends from adjacent the distal end to adjacent the proximal end of the lead. The second portion has an inner surface received over the outer surface of the first portion, and the second portion further having an outer surface abutting an inner surface of the associated body passage that receives the lead therein. The integrated feature is alternatively a wire, band, or spoke assembly.

A system and method for positioning sheaths into the Coronary Sinus using a guiderail catheter.

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.