P. Grossman et al., CARDIAC VAGAL CONTROL AND DYNAMIC-RESPONSES TO PSYCHOLOGICAL STRESS AMONG PATIENTS WITH CORONARY-ARTERY DISEASE, The American journal of cardiology, 78(12), 1996, pp. 1424
Two groups of patients with coronary artery disease who differed in le
vel of cardiac vagal control were compared in their cardiovascular res
ponses to psychological stress. Patients with lower vagal control mani
fested increased reactions in diastolic blood pressure and rate-pressu
re product to mental stress and tended to have greater systemic vasoco
nstriction.