Therapy-selection methods for implantable heart monitors
US7440799B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 19, 2004 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Jul 27, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/39622
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Miniature heart-monitoring devices, such as defibrillators and cardioverters, are implanted in humans to detect and correct abnormal heart rhythms Microprocessors and stored instructions, or algorithms within these devices govern how they interpret and react to abnormal heart rhythms. Algorithms that are too simple lead to unnecessary shocking of the heart, while those that are too complex consume considerable battery power. Accordingly, the inventor devised a relatively simple yet accurate algorithm for determining appropriate therapy options. One version of the algorithm computes three statistics—a range statistic, a minimum interval statistic, and a dispersion index—from a set of depolarization intervals. A scalar interval dispersion assessment, based on the three statistics, is then compared to a threshold to identify a rhythm as a flutter or fibrillation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.