John D Wenstrom

Address:

1768 Ashland Ave, Saint Paul, MN 55104

Phone:

651-6470222

VIN:

1NXBR30E57Z854637

Make:

TOYOTA

Model:

COROLLA

Year:

2007

US Patent:

52857930, Feb 15, 1994

Filed:

May 21, 1992

Appl. No.:

7/886727

Inventors:

David P. Slovut - Golden Valley MN
R. M. Bolman - Minneapolis MN
Richard W. Bianco - Minneapolis MN
John C. Wenstrom - Salida CO

Assignee:

Regents of the Univeristy of Minnesota - Minneapolis MN

International Classification:

A61B 50452

US Classification:

128706

Abstract:

A method and apparatus for diagnosing heart rejection is disclosed. Heart rejection is diagnosed based on the pattern of interbeat intervals. The interbeat intervals of the heart are measured shortly after transplant to establish a baseline pattern. The patterns of interbeat intervals from subsequent measurements are compared to the baseline to detect changes from the baseline indicating rejection. The apparatus of the invention measures the interbeat intervals using a Schmidt trigger that detects the upstroke of the QRS and produces a corresponding pulse. The intervals between pulses are timed to produce a series of interbeat interval measurements that are stored and analyzed. Software provides for automated pattern analysis.