Figure Legends:
Figure 1: A. Spectrum of the preoperative IMA demonstrated a systolic dominance and high RI. B. Measurement of the angle between the initial segment of IMA and the subclavian artery. C. Color-flow Doppler image of IMA. D. Postoperative flow spectrum of IMA.
Figure 2. Regression analysis of the correlation between intraoperative vascular flow and angle between the internal mammary artery (IMA) and the subclavian artery. Flow: intraoperative flow in the vascular graft; Angle: angle between the IMA and the subclavian artery.