Fig. 5

Effects of different intensities of RTLI on the endothelium-dependent tension of vascular ring. (A) Comparison of relaxation responses to acetylcholine between groups N and H. *P < 0.05. (B) Comparison of the relaxation response to acetylcholine among groups H, S3qod, and R3qod. (C) Comparison of the relaxation response to acetylcholine among groups H, S3qd, and R3qd. (D) Comparison of relaxation response to acetylcholine among groups H, S6qd, and R6qd. *P < 0.05 compared with group H; ΔP < 0.05 compared with group S6qd. Data are presented as the mean ± SD, n = 10, 9, 7, 6, 8, 7, 6, and 9 in groups N, H, S3qod, R3qod, S3qd, R3qd, S6qd, and R6qd, respectively