From: Relaxation matters: comparison of in-vitro vasodilatory role of botulinum toxin-A and papaverine in human radial artery grafts
Vasoconstrictor
Inhibitor agent
0th hour
2nd hour
5-HT 10− 6 M
BTX-A 10− 6 M
67.8 ± 7.5%
61.6 ± 6.3%
Pap 10− 4 M
11.3 ± 6.1% *
19.7 ± 6.4% *
ET-1 10− 8 M
46.5 ± 10.7%
44.4 ± 16.8%
41.0 ± 13.2%
67.4 ± 23.7%