Patent · US Active

Automatic measurement of ischemic levels in coronary segments to determine artery responsible therefor

US8983589B2 · kind B2 · utility

0Cited by
1References
10Claims
0Family size

Inventor

Key dates

Filing dateNov 23, 2012
Grant dateMar 17, 2015
Priority date—
Expiry dateJan 31, 2033

Classification

  • Technology area (CPC A)Human Necessities
  • CPC primaryA61B5/316
  • WIPO fieldMedical technology
  • WIPO sectorInstruments

Abstract

A method for localizing ischemia in segments of a heart in a patient under test includes attaching a plurality of electrodes to the patient to form a plurality of leads, capturing electric signals at each of the leads, determining a normalized vector magnitude for each lead as is inherent in a normal heart, calculating an output for each cardiac segment as a percentage of the left ventricle (LV) by adding up the contributions for all of the leads in the direction of each segment at the J point based on the normalized vector magnitudes and a correct calibration factor for conversion to the percent of LV and taking a dot product of each lead vector and each segment vector to identify a normalized response for each lead at each segment center and using the dot products to multiply the ST J-point signal for each lead.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.