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- W1967779901 abstract "Exercise-induced electrocardiographic ST depression was compared during supine and erect graded bicycle exercise in 43 patients with chest pain but no prior myocardial infarct; all had greater than or equal to 1 mm of ST depression during either erect or supine exercise; 16 had multivessel, 24 had 1-vessel and 3 had no coronary artery disease. Supine exercise used 4 minutes/stage and erect exercise used either 4 minutes or 3 minutes/stage with identical graded work loads for both postures. Chest pain occurred in 31 patients during erect and in 29 during supine exercise. ST depression was greater than or equal to 1 mm in 28 patients during erect exercise and in all 43 during supine exercise (p less than 0.001); mean maximal ST depression was 1.3 +/- 0.2 mm during erect and 2.6 +/- 0.2 mm during supine exercise (p less than 0.001). Maximal work load was higher during erect than supine exercise (745 +/- 32 versus 678 +/- 32 kpm/min; p less than 0.001). The accentuation of ST depression by supine posture was not attributable to the changes in heart rate, rate-pressure product or mean blood pressure during supine versus erect exercise. In the 10 patients who had 2 erect bicycle tests using work load durations of 3 and 4 minutes, the maximal ST depression was not significantly different (erect 3 minutes 1.3 +/- 0.5 mm and erect 4 minutes 1.4 +/- 0.4 mm).(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W1967779901 date "1983-12-01" @default.
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- W1967779901 title "Comparison of supine and erect bicycle exercise electrocardiography in coronary heart disease: Accentuation of exercise-induced ischemic ST depression by supine posture" @default.
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- W1967779901 doi "https://doi.org/10.1016/0002-9149(83)90568-4" @default.
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