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- W1960343695 abstract "To investigate the effect of different levels of central blood volume on cardiac performance during exercise, M-mode echocardiography was utilized to determine left ventricular size and performance during cycling exercise in the upright posture (UP), supine posture (SP), and head-out water immersion (WI). At submaximal work loads requiring a mean O2 consumption (Vo2) of 1.2 1/min and 1.5 1/min, mean left ventricular end-diastolic and end-systolic dimensions were significantly greater (P less than 0.05) with WI than UP. In the SP during exercise, left ventricular dimensions were intermediate between UP and WI. Heart rate did not differ significantly among the three conditions at rest and at submaximal exercise up to a mean Vo2 of 1.8 1/min. However, at a mean Vo2 of 2.4 1/min, heart rate in the UP was significantly greater than WI (P less than 0.01) and the SP (P less than 0.05). Maximal Vo2 did not differ statistically in the three conditions. These data indicate that a change in central blood volume results in alterations in left ventricular end-diastolic and end-systolic dimensions during moderate levels of exercise and a change in heart rate at heavy levels of exercise." @default.
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- W1960343695 date "1984-12-01" @default.
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- W1960343695 title "Effect of central hypervolemia on cardiac performance during exercise" @default.
- W1960343695 doi "https://doi.org/10.1152/jappl.1984.57.6.1662" @default.
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