Patent ID: 11963743
Assignee: COROVENTIS RESEARCH AB
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 22:
23. A system for determining microvascular resistance reserve, MRR, in the myocardium perfused by a normal or a stenotic coronary artery of a human patient, comprising:
a processing unit;
a first pressure measuring instrument configured for measuring blood pressure, Pa,rest during rest condition of the patient at a position proximal in the coronary artery or proximally of any steno sis, if present;
a second pressure measuring instrument configured for measuring blood pressure Pa,hyper, during maximum hyperemia of the patient at a position proximal in the coronary artery or proximally of any steno sis, if present;
wherein said processing unit is configured for obtaining the blood pressure measurements Pa,rest, Pa,hyper from the first and second pressure measuring instruments and obtaining at least one signal comprising data indicative of the Coronary How Reserve, CFR, and the Fractional Flow Reserve, FFR, of the coronary artery of the patient, and wherein the processing unit is further configured for calculating the microvascular resistance reserve as, M
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