Table 2.

Hemodynamic responses during mental stress with or without SMTC

	Saline		SMTC
	Baseline	Stress	Baseline	Stress
Heart rate, beats/min	59 ± 3.7	60 ± 3.9	55 ± 3.0	62 ± 4.9
Systolic BP, mmHg	117 ± 3.7	120 ± 6.0	114 ± 4.0	119 ± 5.4
Mean BP, mmHg	84 ± 1.4	83 ± 2.7	81 ± 3.0	84 ± 3.5
Diastolic BP, mmHg	68 ± 2.3	64 ± 2.5	65 ± 3.9	67 ± 4.3
Coronary blood flow, ml/min	38 ± 3.9	52 ± 5.4†	31 ± 4.0	40 ± 4.5†‡
Coronary conductance, units	0.49 ± 0.04	0.61 ± 0.08*	0.42 ± 0.06	0.53 ± 0.05*‡

Values are means ± SE. SMTC, S-methyl-l-thiocitrulline; BP, blood pressure.

^*P < 0.05 and

^†P < 0.01 vs. the preceding baseline.

^‡Significant interaction between groups.