Method and apparatus for evaluating ventricular performance during isovolumic contraction
US7233821B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2005 |
| Grant date | Jun 19, 2007 |
| Priority date | — |
| Expiry date | Nov 24, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36528
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of evaluating ventricular performance of a heart employing sensors to measure a ventricular dimension signal and deriving indices of ventricular performance therefrom. Premature Shortening (PS) and Isovolumic Lengthening (IL) comprise two indices of ventricular performance determined from analysis of the left ventricular dimension signal during the transition from ventricular filling to ventricular ejection. Measured values of PS and IL are compared to other measured values or reference values to determine if ventricular performance has improved (or worsened). In some embodiments, the dimension sensors may comprise piezoelectric sonomicrometer crystals that operate as ultrasound transmitters and receivers. The sensors may be mounted in relation to a ventricle of the heart either temporarily or permanently, and may be configured either separately from or integrally with cardiac pacing leads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.