A medical information processing system according to an embodiment includes processing circuitry. The processing circuitry acquires a blood-vessel blood flow index in a coronary artery and a myocardial blood flow index in a myocardial region to which the coronary artery supplies blood. The processing circuitry calculates an index indicating a capability to supply the blood to the myocardial region by combining the blood-vessel blood flow index and the myocardial blood flow index.
