Patent ID: 9101275
Filing Date: 2015-08-11
Classification: A61B,A61N

Abstract:
1. A system comprising: an acoustic energy sensor, configured to sense an acoustic signal of a subject; a heart sound detector circuit, configured to detect a heart sound signal using the acoustic signal; a physiological signal sensing circuit configured to detect a physiological pulsatile signal associated with the subject's pulse and including a pulsatile cervical impedance signal; a timing circuit, coupled to the heart sound detector circuit and the physiological signal sensing circuit, configured to calculate a time interval between a feature on the heart sound signal and a feature on the pulsatile signal; and at least one of an ambulatory medical device or an adjunct device including a diagnostic circuit configured to determine a physiologic diagnostic indication using information provided by the timing circuit about the time interval between the feature on the heart sound signal and the feature on the pulsatile signal.