Methods and apparatus for discriminating polymorphic tachyarrhythmias from monomorphic tachyarrhythmias facilitating detection of fibrillation
US7103405B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2003 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Feb 16, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0031
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Systems and methods employing a weighted zero crossing sum metric (WZCSM) derived from the EGM that improves the specificity of discriminating between a monomorphic tachyarrhythmia and a polymorphic tachyarrhythmia are provided that examine frequency content and baseline information of the EGM as discriminatory signatures are disclosed. In preferred embodiments, high rate polymorphic QRS complexes are discriminated from high rate monomorphic QRS complexes to increase the specificity of detection of polymorphic VT and VF. Zero crossing points (ZCPs) and weighted ZCP slopes of the high pass filtered EGM signal in baseline and sense event windows are identified. The weighted ZCPs of the baseline window are summed to provide a baseline WZCSB, and the weighted ZCPs of the VSENSE event window are summed to provide a VSENSE event WZCSE. A WZCSM is derived from the VSENSE event WZCSE and the baseline WZCSB that is compared to a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.