Sympathoadrenal and cardiovascular responses to mental stress, isometric handgrip, and cold pressor test in asymptomatic young men with primary T wave abnormalities in the electrocardiogram.

25 young asymptomatic men, comprising 12 with primary T wave abnormalities in the electrocardiogram (notching, flattening, or inversion without concomitant ST depression in leads II, V4, and V6) and without a history or signs of cardiac disease, and 13 matched controls.

Stressful provocations including a standardised mental stress test, isometric hand grip, and a cold pressor test.

13 matched controls without T wave abnormalities undergoing the same provocations.

Sympathoadrenal activity (plasma noradrenaline, adrenaline, and dopamine) and cardiovascular responses (blood pressure and impedance cardiography) at rest and during stressful provocations.surrogate