Trending S1 heart sounds amplitudes in ambulatory patients for worsening HF detection
US10166001B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2016 |
| Grant date | Jan 1, 2019 |
| Priority date | — |
| Expiry date | Dec 2, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B7/04
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus comprises a cardiac signal sensing circuit, a heart sound sensing circuit, and a signal processing circuit. The cardiac signal sensing circuit is configured to sense a plurality of cardiac signals representative of electrical cardiac activity of a subject. The heart sound sensing circuit is configured to sense a plurality of unfiltered heart sound signals representative of intrinsic mechanical cardiac activity of the subject. The signal processing circuit is configured to: detect an R-wave in a sensed cardiac signal and initiate a measurement window in a time relationship to the detected R-wave; determine amplitude of an S1 heart sound using a heart sound signal sensed during the measurement window; trend S1 heart sound amplitudes determined for the plurality of the unfiltered heart sound signals; and generate an alert when the trended S1 heart sound amplitude decreases below a threshold amplitude value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.