from The New England Journal of Medicine It has long been known that carotid sinus massage can terminate supraventricular tachycardia (SVT). This is due to the fact that the carotid sinus, which sits at the bifurcation of the common carotid artery into the internal and external carotid arteries, contains stretch-sensitive baroreceptors. When they are externally compressed during carotid massage, they send signals to the brain, which increases vagal outflow to the heart. The v