Caffeine's Vascular Mechanisms of Action

Table 2

Vascular effects of adenosine.

Vasculature	Effect	Receptor
Coronary	Vasodilation	A2a
Pulmonary
1. Pulmonary artery	Vasoconstriction	A1
	Vasodilation	A2a
2. Microcirculation	Vasodilation	A2b
Mesenteric	Vasodilation	Unknown
Renal
1.General circulation	Vasodilation	A2a
2. Afferent arteriole	Vasoconstriction	A1
Aorta	Vasodilation	A2b