Ischemic cardiopathy diagnosis assistance system

An ischemic cardiopathy diagnosis assistance system that measures intracoronary pressure in a proximal stenotic segment upstream of a stenotic lesion site in a coronary artery of a patient and intracoronary pressure in a distal stenotic segment on a downstream side and finds a pressure ratio between the proximal stenotic segment and distal stenotic segment as a diagnosis index of ischemic cardiopathy, the assistance system comprising:

• pressure data acquisition means for acquiring pressure data including proximal pressure, which is pressure in the proximal stenotic segment, and distal pressure, which is pressure in the distal stenotic segment;
• intracoronary electrocardiogram data acquisition means 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 for finding the pressure ratio at a time suitable for diagnosis of ischemic cardiopathy based on the data acquired by the pressure data acquisition means and the data acquired by the intracoronary electrocardiogram data acquisition means, wherein
• the computational processing means includes a pressure data extraction unit configured to temporally associate the pressure data with the intracoronary electrocardiogram data, estimates an analysis period during which vascular resistance remains stably low from a waveform of the intracoronary electrocardiogram data, and extract the pressure data of the analysis period, and a pressure ratio determination unit configured to find the pressure ratio from the pressure data extracted by the pressure data extraction unit.