Spare Adenosine A2a Receptors Are Associated with Positive Exercise Stress Test in Coronary Artery Disease

Table 2 Biological variables of patients with positive and negative exercise stress test.

	APC^a basal (µmol/L)	APC end of test (µmol/L)	APC recovery (µmol/L)	A_2AR^b expression (AU)	K_D (µmol/L)	EC₅₀ (µmol/L)
EST+^c	0.52 ± 0.12^d	0.86 ± 0.13	0.53 ± 0.16	17 ± 3	0.40 ± 0.20	0.21 ± 0.27
EST−^e	0.60 ± 0.10	0.80 ± 0.07	0.32 ± 0.06	23 ± 2	0.30 ± 0.13	0.40 ± 0.20

^aAPC: adenosine plasma concentration.
^bA_2AR: adenosine A_2A receptor.
^cEST+: positive exercise stress test (n = 14).
^dMeans and standard deviations (mean ± SD) of biological parameters evaluated in patients with coronary artery disease.
^eEST−: negative exercise stress test (n = 3).

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