Figure 2c. Graphs show absolute values (and mean ± SD) of (a) Doppler US-based intracoronary blood flow (CBF), (b) electron-beam CT-based intramyocardial blood volume (BV), and (c) perfusion (F) at rest and in response to adenosine at baseline and at follow-up. Within the baseline and follow-up studies separately, intracoronary blood flow, blood volume, and perfusion significantly increased in response to adenosine (P < .001, respectively). The increase in blood volume and perfusion at follow-up in response to adenosine was greater than that at baseline, and this is consistent with intracoronary blood flow measurements (P < .001 for blood volume, perfusion, and intracoronary blood flow).