公开(公告)号：US20210267467A1

公开(公告)日：2021-09-02

申请号：US17259988

申请日：2019-07-19

Applicant: WASEDA UNIVERSITY

Inventor： Masafumi Nakayama ,  Kiyotaka Iwasaki

IPC: A61B5/0215 ,  A61B5/026 ,  A61B5/349 ,  A61B5/00

Abstract: An ischemic cardiopathy diagnosis assistance system includes pressure data acquisition means 11 for acquiring pressure data including proximal pressure Pa in a proximal stenotic segment A1 and distal pressure Pd in a distal stenotic segment A2; intracoronary electrocardiogram data acquisition means 12 for acquiring intracoronary electrocardiogram data made up of a local intracoronary artery electrocardiogram in a neighborhood of the distal stenotic segment; and computational processing means 14 for finding a pressure ratio Pa/Pd between the proximal pressure Pa and distal pressure Pd at a time suitable for diagnosis of ischemic cardiopathy based on these data. The computational processing means temporally associates the pressure data with the intracoronary electrocardiogram data, estimates an analysis period T during which vascular resistance remains stably low from a waveform of the intracoronary electrocardiogram data, and extract the pressure data of the analysis period T, and finds the pressure ratio Pa/Pd from the pressure data.