Method and apparatus for the measurement and analysis of cardiac rates and amplitude variations
US5277189A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 16, 1991 |
| Grant date | Jan 11, 1994 |
| Priority date | — |
| Expiry date | Aug 16, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0245
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus are provided for measuring selected patient heartbeat parameters such as heartrates and amplitude variations, for processing the measured parameters to place them in more usable form and for analyzing measured and processed heartbeat parameters to obtain certain useful information concerning the condition of the patient's cardiac function. Measurement preferably involves detection and storage of at least two of the P, R and T pulses for each heartbeat and the conversion of such information into time series for selective heartrates. Indicators .delta..sub.j are computed for selected ones of the time series for selected values of j and the computed .delta..sub.j 's are then compared against stored .delta..sub.j values to obtain a measure of the state of cardiac function. The time series are preferably notched, detrended and normalized prior to being analyzed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.