METHODS AND SYSTEM FOR TRACKING HEART SOUNDS

摘要

Systems and methods for tracking heart sounds are disclosed. The system can include a heart sound (HS) receiver circuit configured to receive HS information, and a HS analyzer circuit coupled to the HS receiver circuit. The HS analyzer circuit can determine a HS timing parameter of a specified HS component. The HS component includes at least a portion of one of S1 S2, S3, or S4 heart sound. The HS analyzer circuit can include first and second feature detector circuits each configured to respectively detect first and second one or more candidate features. The HS analyzer circuit can also include a feature selection circuit that can produce an inter-categorical metric, and determine first and second selected features using at least the inter-categorical metric. A HS recognition circuit can determine the timing parameter of the HS component using the first and second selected features.

主权项

1. A system, comprising:
a heart sound (HS) receiver circuit, configured to receive HS information including at least one HS waveform; and a HS analyzer circuit, coupled to the HS receiver circuit, configured to determine a HS timing parameter of a specified HS component within the at least one HS waveform, the specified HS component including at least a portion of one of S1 S2, S3, or S4 heart sound, the HS analyzer circuit including:
a first feature detector circuit configured to detect first one or more candidate features within the at least one HS waveform;a second feature detector circuit configured to detect different second one or more candidate features within the at least one HS waveform;a feature selection circuit configured to produce an inter-categorical metric indicative of temporal relationship between the first one or more candidate features and the second one or more candidate features, and to determine a first selected feature from the first one or more candidate features, or to determine a second selected feature from the second one or more candidate features, using at least the inter-categorical metric; anda HS recognition circuit configured to determine the HS timing parameter of the specified HS component using a comparison between the first and second selected features; wherein the first one or more candidate features and the second one or more candidate features each include a respective feature timing indication and a respective feature intensity indication.