Table 3. Receiver operating characteristic analysis for predicting CRT response.

Test variables	Area under the curve	P-value
L-arginine	0.875	0.003
Homo-L-arginine	0.846	0.006
Taurine	0.838	0.007
Ornithine	0.801	0.017
L-arginine + Homo-L-arginine + Taurine + Ornithine	0.897	0.002
L-arginine + Homo-L-arginine + Taurine	0.897	0.002
L-arginine + Taurine	0.897	0.002
L-arginine + Homo-L-arginine	0.882	0.002
L-arginine + Ornithine	0.868	0.004

CRT: cardiac resynchronization therapy.