A pacing system includes a signal generator and an electromechanical switch. The signal generator is configured to generate a pacing signal. The electromechanical switch has a plurality of outputs that are configured to be coupled to a plurality of electrodes inserted into a heart of a patient, each output configured to deliver the pacing signal to a respective electrode. The electromechanical switch is configured to route the pacing signal to no more than a single selected one of the outputs at any given time, so as to pace the heart using no more than a single selected one of the electrodes.

A method of controlling a defibrillator with a function of analyzing an electrocardiogram, includes: dividing an electrocardiogram of a patient into a plurality of analysis zones; executing analysis of the electrocardiogram in each of the divided analysis zones; based on a result of the analysis of the electrocardiogram in each of the analysis zones, executing determination whether electric shock on the patient is necessary or not, and calculating reliability of the determination; and based on a combination of the determination and the reliability, instructing a first procedure to be performed on the patient.

A disposable pacemaker comprises a housing including a stylet port, a pulse generator printed circuit board assembly situated in the housing, and a pacing lead secured to the housing. The pacing lead includes a lumen aligned with the stylet port, such that the stylet port and the lumen of the pacing lead are configured to receive a stylet.

In one example, an apparatus of a wearable cardioverter defibrillator (WCD) system comprises a support structure wearable by a patient, a plurality of electrocardiogram (ECG) electrodes to obtain an ECG signal, a processor to receive and analyze the ECG signal of the patient, wherein the processor is configured to monitor four or more channels of the ECG signal, a high voltage subsystem coupled with defibrillation electrodes configured to be coupled with patient, wherein the high voltage subsystem is to apply a therapeutic shock to the patient through the defibrillation electrodes in response to a shockable detected by the processor from the ECG signal. The processor measures a peak-to-peak amplitude of QRS complexes of the ECG signal, and detects asystole in the patient when the peak-to-peak amplitude of one or more QRS complexes is less than an asystole threshold. Other examples and related methods are disclosed herein.

A non-invasive bodily-attached ambulatory medical monitoring and treatment device with pacing is provided. The noninvasive ambulatory pacing device includes a battery, at least one therapy electrode coupled to the battery, a memory storing information indicative of a patient's cardiac activity, and at least one processor coupled to the memory and the at least one therapy electrode. The at least one processor is configured to identify a cardiac arrhythmia within the information and execute at least one pacing routine to treat the identified cardiac arrhythmia.

A non-invasive medical device includes a garment; at least one therapy electrode and a plurality of ECG sensing electrodes disposed in the garment; a memory storing ECG information of the patient; a therapy delivery interface; and at least one processor configured to identify, within the ECG information, at least one cardiac arrhythmia condition; determine at least one pacing routine corresponding to the detected cardiac arrhythmia condition; cause the therapy delivery interface to execute the at least one pacing routine by delivering a first pacing pulse; determine, subsequent to the first pacing pulse, that a first interval has passed without detection of an intrinsic heartbeat, and in response, cause the therapy delivery interface to continue executing the at least one pacing routine by delivering a second pacing pulse; and responsive to determining that the intrinsic heartbeat is detected within the first interval, suspend execution of the at least one pacing routine.

An electrical connector includes a plug that mates with a receptacle. In a medical application, the plug is connected to electrical leads that pass through a patient's skin to an implanted medical device in the patient's body, while the receptacle is connected to external medical equipment. All electrical contacts in the plug are on internal portions. The receptacle includes annular contacts that contact the internal electrical contacts on the plug when the plug and receptacle are properly mated. The receptacle includes a plurality of annular electrical contacts that have a first diameter and are separated by a plurality of annular insulators having a second diameter smaller than the first diameter.

A dynamically adjustable multiphasic pulse system and method are provided. The dynamically adjustable multiphasic pulse system may be used as pulse system for a defibrillator or cardioverter.

Provided is a heart-rate control device capable of adjusting the heart rate of a subject to a desired value between a base heart rate and an active heart rate, such as a heart rate immediately after physical exercise. The heart-rate control device includes a detector for detecting heartbeat information of a subject, an input unit to which information on a target value relating to a heart rate of the subject is to be inputted, a difference extracting unit for determining a difference between the target value and a current value relating to the heart rate of the subject, the current value being calculated from the heartbeat information, a pattern generating unit for generating a stimulus pattern depending on the difference so that the current value approaches the target value, the stimulus pattern being a combination of a sympathetic nerve stimulus for stimulating sympathetic nerves, a parasympathetic nerve stimulus for stimulating parasympathetic nerves, and an initialization stimulus for preventing stimulus saturation of the sympathetic nerves or the parasympathetic nerves, and an output unit for outputting the sympathetic nerve stimulus, the parasympathetic nerve stimulus and the initialization stimulus to the subject in accordance with the stimulus pattern.

A novel therapeutic biphasic or multiphasic pulse waveform and method are provided. The novel therapeutic biphasic or multiphasic pulse waveform may be used in a defibrillator, or in another medical device that delivers therapeutic electrical stimulation pulses to a patient.