Here's what I have in my notes:
Bezold-Jarisch Reflex: Ventricular stretch receptors detect decreased preload which leads to bradycardia to increase filling time, and can respond faster than carotid sinus baroreceptors (which would lead to tachycardia)
Bainbridge Reflex: Atrial stretch detects increased blood volume in right atrium and leads to tachycardia