Methods and apparatus for improved tachycardia discrimination in an active medical device
US5868793A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1997 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Oct 23, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3622
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An active implantable medical device of the defibrillator/cardiovertor type with an improved tachycardia discrimination for utilizing the delivery of a therapy of defibrillation and/or cardioversion and/or antitachycardia stimulation in the ventricle and/or atrium. The atrial and ventricular activity is monitored, and suspected tachycardia episodes in the monitored activity is tested and confirmed, the stability of RR intervals and the stability of associated PR interval are analyzed. The classification discriminates tachycardias detected as between ventricular tachycardias and supra-ventricular tachycardias, and authorizes delivery of a shock therapy in the presence of a confirmed ventricular tachycardias, or inhibits delivery of a shock therapy in response to a confirmed supra-ventricular tachycardia. Where appropriate, the classification also releases an atrial therapy. The improvement concerns determining the presence or the absence of a rapid acceleration of the rhythm of RR intervals, and determining, if necessary, the origin (atrial or ventricular) of such acceleration, in the case of the detection of unstable RR intervals for discriminating tachycardias.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.