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We examined the effects of mental stress during steady-state exercise on heart rate, blood pressu... more We examined the effects of mental stress during steady-state exercise on heart rate, blood pressure, pressure-rate product, and oxygen uptake in 10 coronary artery disease patients. Subjects walked at three mph with grade increases of 4% every two minutes until the target heart rate (60 % peak heart rate from a previous symptomlimited exercise test) was reached. A computerized Stmp-Color-Word Test (mental stress) was added one minute after the subject reached steady-state exercise and lasted 11 5 4 minutes. When mental stress was added to steadystate exercise it significantly (p<O.Ol) increased the heart rate(lOlfl5 to 108f19beatspermin), systolic(154f26 to 170f26 mmHg) and diastolic (86f 10 to 92 f 13 mmHg) blood pressure, and pressure-rate product (158k42 to 179f48 x lo-*). This increase in the mean response during exercise and mental stress was not observed for oxygen uptake (17 f 6 to 18 f5 ml/kg/min). The circulatory changes probably reflect increased sympathetic activity with both centrally mediated cardioacceleratory (and probably cardiac output
We examined the effects of mental stress during steady-state exercise on heart rate, blood pressu... more We examined the effects of mental stress during steady-state exercise on heart rate, blood pressure, pressure-rate product, and oxygen uptake in 10 coronary artery disease patients. Subjects walked at three mph with grade increases of 4% every two minutes until the target heart rate (60 % peak heart rate from a previous symptomlimited exercise test) was reached. A computerized Stmp-Color-Word Test (mental stress) was added one minute after the subject reached steady-state exercise and lasted 11 5 4 minutes. When mental stress was added to steadystate exercise it significantly (p<O.Ol) increased the heart rate(lOlfl5 to 108f19beatspermin), systolic(154f26 to 170f26 mmHg) and diastolic (86f 10 to 92 f 13 mmHg) blood pressure, and pressure-rate product (158k42 to 179f48 x lo-*). This increase in the mean response during exercise and mental stress was not observed for oxygen uptake (17 f 6 to 18 f5 ml/kg/min). The circulatory changes probably reflect increased sympathetic activity with both centrally mediated cardioacceleratory (and probably cardiac output