近十年前的研究表明，许多动物事实上利用硫化氢来扩张血管。产生血流扩张的化学物质被称作血管扩张剂。

Research early this decade revealed that many animals actually use hydrogen sulfide to help expand blood vessels. Chemicals that create these expansions in blood flow are called vasodilators.

血管扩张剂能松弛血管平滑肌，因此降低全身血管阻力。

Vasodilatory agents relax vascular smooth muscle, thereby reducing SVR.

目的：高压氧配合血管扩张剂治疗急性视网膜动脉阻塞的疗效观察。

Objective to observe the curative effect of vasodilator with hyperbaric oxygen for acute retinal arterial obstruction.

有项高海拔自行车赛的试验，应用血管扩张剂以后(万艾可的化学名)，运动员每6公里可以缩短15%的时间。

A study of cyclists who took sildenafil citrate (the chemical name for Viagra) while racing at altitude found that it reduced their time over 6km by 15 per cent.

苯骈吡喃类钾通道启开剂具有很强的血管扩张作用，可望成为较理想的抗高血压药物。

Potassium channel openers, most of which are benzopyran compounds, possess significant activity of vasodilation and may become promising antihypertensive drugs.