Table 2.

Results of coronary reactivity testing

Coronary microvascular dysfunction pathways	Microvascular dysfunction	Macrovascular dysfunction
Non-endothelial dependent	aCoronary flow reserve in response to adenosine 2.8 (normal ≥ 2.5)	bChange in coronary diameter in response to nitroglycerin 0% (normal ≥ 20%)
Endothelial dependent	cChange in coronary blood flow in response to acetylcholine 48% (normal ≥ 50%)	dChange in coronary diameter in response to acetylcholine − 6% (normal ≥ 5%)

^a Non-endothelial-dependent microvascular dysfunction with coronary flow reserve 2.8 (adenosine). ^b Non-endothelial-dependent macrovascular dysfunction with 0% (nitroglycerin) coronary diameter change. ^c Endothelial-dependent microvascular dysfunction with coronary blood flow change 48%. ^d Endothelial-dependent macrovascular dysfunction with coronary diameter change − 6% in response to acetylcholine