Abstract: A method and a medical device for implementing a dual-chamber pacing mode without ventricular pacing are disclosed. The method includes: obtaining pacing mode information configured by a user; controlling a dual-chamber pacemaker to operate in an ADD mode and detecting whether there is a need for delivering a pace; and performing a predetermined interruption process if a need for delivering a pace is detected. The predetermined interruption process includes: 2041) determining whether a chamber to be subsequently paced is a ventricle; 2042) if it is determined that the chamber to be subsequently paced is a ventricle, determining whether there is a need for delivering a real ventricular pace; 2043) if delivery of a real ventricular pace is not needed, delivering a virtual ventricular pace VVP and resetting a first atrial escape interval; and returning after the predetermined interruption process is terminated.

Abstract: A method and a medical device for implementing a dual-chamber pacing mode without ventricular pacing are disclosed. The method includes: obtaining pacing mode information configured by a user; controlling a dual-chamber pacemaker to operate in an ADD mode and detecting whether there is a need for delivering a pace; and performing a predetermined interruption process if a need for delivering a pace is detected. The predetermined interruption process includes: 2041) determining whether a chamber to be subsequently paced is a ventricle; 2042) if it is determined that the chamber to be subsequently paced is a ventricle, determining whether there is a need for delivering a real ventricular pace; 2043) if delivery of a real ventricular pace is not needed, delivering a virtual ventricular pace VVP and resetting a first atrial escape interval; and returning after the predetermined interruption process is terminated.

Abstract: A cardiac pacemaker system and control methods thereof are disclosed, wherein pacing logic and timing functions are enabled by a microprocessor and sensing and pulse delivery capabilities are accomplished by a peripheral IC. The microprocessor communicates with the peripheral IC via serial interfaces and electrical level signals. This allows for full use of internal resources of the modern ultra-low power microprocessor, lowering the dependence of the system on the peripheral IC and reducing the effort required for digital circuit design.

Abstract: A medical device for treating cardiac arrhythmia includes a microprocessor. A MCU configures the medical device to operate in a modified DVI (R) mode in which: when receiving a signal indicating the sensing of an atrial event, the MCU sets a PANP interval and sends to a time control unit a signal; if a scheduled post-ventricular atrial escaping interval is to end at a time not within the PANP internal, the MCU sends respective signals to a pacing control/generation unit and the time control unit to dictate the pacing control/generation unit and control a second timing unit to use a PAVI as a next ventricular escape interval; and if the scheduled post-ventricular atrial escaping interval is to end within the PANP interval, the MCU sends a signal to the time control unit, controlling the second timing unit to use the PAVI as the next ventricular escape interval.

Abstract: A mini loudspeaker includes a shell, a vibration system and a magnetic circuit system are received in the shell, and the shell is made up by jointing at least two shell bodies. A protruding sealing portion is provided on one of the shell bodies at a portion where the shell body is sealed with another shell body, the sealing portion is formed integrally with the shell body by bi-color injection molding process, material of the sealing portion has a hardness smaller than hardness of material of the shell body and has compressibility; the shell body is further provided with a jointing component configured to join the shell body to another shell body, and the jointing component and the sealing portion are located on the same side. The mini loudspeaker addresses the sealing issue of products under the condition of a small space and has a good sealing performance.

Abstract: A medical device for treating cardiac arrhythmia is disclosed, including: a microprocessor (8) and a digital/analog module (9).

Abstract: A cardiac pacemaker system and control methods thereof are disclosed, wherein pacing logic and timing functions are enabled by a microprocessor and sensing and pulse delivery capabilities are accomplished by a peripheral IC. The microprocessor communicates with the peripheral IC via serial interfaces and electrical level signals. This allows for full use of internal resources of the modern ultra-low power microprocessor, lowering the dependence of the system on the peripheral IC and reducing the effort required for digital circuit design.

Abstract: A mini loudspeaker includes a shell, a vibration system and a magnetic circuit system are received in the shell, and the shell is made up by jointing at least two shell bodies. A protruding sealing portion is provided on one of the shell bodies at a portion where the shell body is sealed with another shell body, the sealing portion is formed integrally with the shell body by bi-color injection molding process, material of the sealing portion has a hardness smaller than hardness of material of the shell body and has compressibility; the shell body is further provided with a jointing component configured to join the shell body to another shell body, and the jointing component and the sealing portion are located on the same side. The mini loudspeaker addresses the sealing issue of products under the condition of a small space and has a good sealing performance.