“ NG‐nitro‐L‐arginine (L‐NOARG, 100 μM), but not indomethacin (10 … the phasic and the tonic contractions induced by His (1–10 μM) in endothelium‐intact, but not in endothelium‐denuded strips, suggesting that … release of nitric oxide (NO) from endothelial cells potently attenuates the His‐induced contractions.”