Systems, methods and implantable devices configured to provide cardiac resynchronization therapy and/or bradycardia pacing therapy. A first device located in the heart of the patient is configured to receive a communication from a second device and deliver a pacing therapy in response to or in accordance with the received communication. A second device located elsewhere is configured to determine an atrial event has occurred and communicate to the first device to trigger the pacing therapy. The second device may be configured for sensing the atrial event by the use of vector selection and atrial event windowing, among other enhancements. Exception cases are discussed and handled as well.

A wet electrolytic capacitor that contains a casing that contains a cylindrical sidewall is provided. The cylindrical sidewall defines an inner surface that surrounds an interior. First and second outer anodes are positioned within the interior of the casing. The first outer anode has a radiused sidewall and an opposing planar sidewall and the second outer anode has a radiused sidewall and an opposing planar sidewall. A central anode is also positioned within the interior of the casing between the first and second outer anodes. The central anode contains opposing first and second outer sidewalls intersecting with opposing first and second inner sidewalls. The first and second inner sidewalls are planar, and the first planar inner sidewall of the central anode faces the planar sidewall of the first outer anode and the second planar inner sidewall of the central anode faces the planar sidewall of the second outer anode.

A wet electrolytic capacitor that contains a casing that contains a sidewall extending to an upper end to define an opening is provided. The sidewall further defines an inner surface that surrounds an interior. At least one anode and at least one cathode are positioned within the interior of the casing, wherein the cathode contains an electrochemically-active material and further wherein an anode lead extends from the anode. A working electrolyte is in electrical contact with the anode and the electrochemically-active material. The capacitor also comprises a lid assembly that contains a lid positioned on an upper end of the casing sidewall, wherein the lid defines an orifice through which a tube extends. The tube accommodates the anode lead that extends from the anode. A dielectric layer is formed on a surface of the tube.

Systems and methods for monitoring patient vasoactivity are discussed. An exemplary patient monitor system includes a sensor circuit configured to generate a heart sound (HS) metric using a HS signal sensed from a patient, and a vasoactivity monitor configured to monitor vasoactivity, such as degree of vasoconstriction or vasodilation, using the HS metric. The system can provide the monitored vasoactivity to a user to alert patient hemodynamic responses to vasoactive drugs, or initiate or adjust a vasoactive therapy according to the vasoactivity. The system may use the monitored vasoactivity to detect a medical condition such as worsening heart failure, pulmonary edema, or syncope.

An implantable system for the diagnostic and/or therapeutic treatment of a human or animal patient contains a processor, a memory, a treatment unit and a remote data transmission unit. The system is characterized in that the memory includes a computer-readable program which prompts the processor to carry out the following steps when the program is being executed on the processor: a) ascertaining whether a treatment functionality of the treatment unit could jeopardize a patient in whom the system was implanted if a diagnostic and/or therapeutic treatment of the patient corresponding to the treatment functionality were to be carried out; b) deactivating the treatment functionality when a potential risk for the patient was ascertained; c) receiving reactivation data by way of the remote data transmission unit; and d) reactivating the deactivated treatment functionality based on the received reactivation data.

Methods and devices providing multiple criteria for use in arrhythmia identification. Based on inputs including defined rules or parameters, one of a more conservative or more aggressive set of arrhythmia identification parameters can be selected. One or the other of the selectable sets of arrhythmia identification parameters may also be adaptive or modifiable during the use of the system, for example, in response to identified nonsustained episodes, the more conservative set of arrhythmia identification parameters can be modified to become still more conservative. Such modification of arrhythmia identification criteria allows reduced time to therapy when indicated, while allowing more deliberate decisions in other circumstances.

Various embodiments of an implantable medical device and a system that includes such device are disclosed. The device includes a housing including a polymeric material, and an electronics module disposed within the housing and having a substrate, a power source disposed on the substrate, and circuitry disposed on the substrate and electrically connected to the power source. The device also includes a conformal coating disposed over at least a portion of the electronics module.

A cardiac medical system, such as an implantable cardioverter defibrillator (ICD) system, receives a cardiac electrical signal by and senses cardiac events when the signal crosses an R-wave sensing threshold. The system determines at least one sensed event parameter from the cardiac electrical signal for consecutive cardiac events sensed by the sensing circuit and compares the sensed event parameters to P-wave oversensing criteria. The system detects P-wave oversensing in response to the sensed event parameters meeting the P-wave oversensing criteria; and adjusts at least one of an R-wave sensing control parameter or a therapy delivery control parameter in response to detecting the P-wave oversensing.

A capacitor includes an anode foil, a cathode foil, a conductive electrolyte, and a separator between the cathode foil and the anode foil. The conductive electrolyte fills between the cathode foil and the anode foil and contains butyrolactone. The separator includes an aromatic polyamide fiber material. The aromatic polyamide fiber material is non-woven and includes a para-aromatic-polyamide synthetic fiber. The separator has a thickness in a range of about 5 μm to about 20 μm and a density of greater than about 1.0 g/cm.sup.3.

A medical device includes a case and a core assembly. The core assembly includes operational circuitry enclosed within a core assembly housing. The medical device also includes a battery assembly, which includes a battery enclosed within a battery housing. The case includes the core assembly housing and the battery housing. A first electrode is coupled to, and electrically isolated from, the case; and a second electrode is electrically coupled to the case. The second electrode is electrically coupled to the operational circuitry via a sensing pathway that includes a portion of the case. The battery is electrically coupled to the operational circuitry via an energy supply pathway that includes the portion of the case.