摘要:
Mechanisms and techniques provide a system that operates in a computerized device(s) to establish a data distribution path for content within a content distribution network by receiving a network topology definition defining at least one hierarchical interconnection of network groups. Each network group comprises at least one content engine. The system also receives a channel definition comprising a selection of a plurality of content engines that are to distribute content within the content distribution network. The plurality of content engines in the channel definition is selected from content engines within the network groups defined within the network topology definition. The system determines an assignment of at least one root content engine within the channel definition and applies a content distribution path determination technique to the network topology definition in relation to the channel definition to determine a set of content distribution paths in the content distribution network to be used for distribution of content from the root content engine(s) to the content engines defined in the channel definition.
摘要:
Mechanisms and techniques provide a system that operates in a computerized device(s) to establish a data distribution path for content within a content distribution network by receiving a network topology definition defining at least one hierarchical interconnection of network groups. Each network group comprises at least one content engine. The system also receives a channel definition comprising a selection of a plurality of content engines that are to distribute content within the content distribution network. The plurality of content engines in the channel definition is selected from content engines within the network groups defined within the network topology definition. The system determines an assignment of at least one root content engine within the channel definition and applies a content distribution path determination technique to the network topology definition in relation to the channel definition to determine a set of content distribution paths in the content distribution network to be used for distribution of content from the root content engine(s) to the content engines defined in the channel definition.
摘要:
An apparatus and method for defining content distribution paths in a content distribution network integrate unicast and multicast connections. Content engines in the content distributed network are organized into channels with a master content engine maintaining specific content. The content distribution network is further organized into a distribution hierarchy based on network topology and channel definitions, first by establishing unicast paths through the content distributed network and then by integrating multicast paths into the unicast hierarchy. The further organization of the content distribution network establishes distribution trees from the channel masters to the network edges.
摘要:
A multi-level amplifier including a converter circuit being supplied with a supply voltage and operable to generate at least two output voltages, a voltage comparator circuit adapted to compare each of the output voltages with the supply voltage to generate a driving signal, and an amplifier circuit being supplied with an analog input signal, the amplifier circuit including an analog-to-digital converter coupled to a power stage driver and power stage, wherein the power stage driver receives the driving signal from the voltage comparator.
摘要:
Various system embodiments comprise at least one sensor input adapted to receive at least one sensed signal associated with a tachyarrhythmia, a feature set extractor adapted to extract at least two features from the at least one sensed signal associated with the tachyarrhythmia, a feature set generator adapted to form a feature set using the at least two features extracted by the feature set extractor, at least one generator adapted for use to selectively apply an anti-tachycardia pacing (ATP) therapy and a neural stimulation (NS) therapy, and a controller adapted to respond to the feature set. The controller is adapted to initiate the NS therapy when the feature set corresponds to criteria for applying the NS therapy to modify the tachyarrhythmia, and initiate the ATP therapy to terminate the modified tachyarrhythmia. Other aspects and embodiments are provided herein.
摘要:
A multi-level amplifier including a converter circuit being supplied with a supply voltage and operable to generate at least two output voltages, a voltage comparator circuit adapted to compare each of the output voltages with the supply voltage to generate a driving signal, and an amplifier circuit being supplied with an analog input signal, the amplifier circuit including an analog-to-digital converter coupled to a power stage driver and power stage, wherein the power stage driver receives the driving signal from the voltage comparator.
摘要:
A cardiac rhythm management (CRM) system includes an implantable medical device that delivers anti-tachyarrhythmia therapies including ATP. When a tachyarrhythmia episode is detected, the implantable medical device analyzes the morphology of a cardiac signal to determine whether and/or when to deliver an ATP therapy. In various embodiments, the implantable medical device produces morphological parameters indicative of the likeliness of success of the ATP therapy and selects an anti-tachyarrhythmia therapy mode based on the morphological parameters. In various embodiments, the implantable medical device also controls the timing of the ATP therapy delivery using morphological features of the cardiac signal to maximize the probability that the ATP therapy is delivered into an ATP window during which a tachyarrhythmia episode can be effectively terminated by pacing.
摘要:
Systems and methods provide for sensing, during an event of tachycardia, hemodynamic signals concurrently from at least two spatially separated locations within a patient, and quantifying a spatial relationship between the hemodynamic signals. Hemodynamic stability or state of the patient during the tachycardia event is determined based at least in part on the quantified spatial relationship. One or more anti-tachycardia therapies to treat the tachycardia may be selected based at least in part on the determined stability or state of patient hemodynamics, and the selected one or more anti-tachycardia therapies may be delivered to treat the tachycardia. The hemodynamic signals may comprise at least two, or a mixed combination, of cardiac impedance signals, cardiac chamber pressure signals, arterial pressure signals, heart sounds; and acceleration signals.
摘要:
A cardiac rhythm management (CRM) system includes an implantable medical device that delivers anti-tachyarrhythmia therapies including anti-tachyarrhythmia pacing (ATP) and a hemodynamic sensor that senses a hemodynamic signal. The implantable medical device includes a hemodynamic sensor-controlled closed-loop ATP system that uses the hemodynamic signal for ATP capture verification. When ATP pulses are delivered according to a selected ATP protocol to terminate a tachyarrhythmia episode, the implantable medical device performs the ATP capture verification by detecting an effective cardiac contraction from the hemodynamic signal. The ATP protocol is adjusted using an outcome of the ATP capture verification.