Indirect assessment of thoracic fluid balance following maximal exercise in man
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CONTRIBUTORS:
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JOURNAL:
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YEAR:
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1983
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PUB TYPE:
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Journal Article
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SUBJECT(S):
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THORAX; BODY-FLUID; RESIDUAL-VOLUME; VITAL-CAPACITY; LUNG; EXERCISE; PULMONARY-EDEMA; TESTING; TREADMILL; MAN; NON-ATHLETE; BLOOD-VOLUME
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DISCIPLINE:
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No discipline assigned
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HTTP:
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LANGUAGE:
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English
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PUB ID:
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103-366-194
(Last edited on
2002/02/27 18:45:05 US/Mountain)
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SPONSOR(S):
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ABSTRACT:
A series of three studies was conducted to help determine the physiological mechanism responsible for the previously reported increase in residual volume following maximal exercise. Study I showed that in 18 male volunteers, residual volume and total lung capacity were significantly increased over the pre-exercise values through 30 and 15 min of recovery, respectively. Transthoracic electrical impedance was significantly decreased below the pre-exercise value through 15 min of recovery. This suggests that there was an increase in intrathoracic fluid following exercise. By experimentally manipulating central blood volume via G-suit inflation and venous occlusion, study II showed that post-exercise residual volume was relatively insensitive to increases in intravascular fluid within the thorax. Study III showed that the post-exercise diffusion capacity was unchanged following exercise, despite an increase in the post-exercise heart rate. It was concluded that a subclinical pulmonary oedema is present following maximal exercise. A logical sequence of events was proposed as a possible explanation for the response of residual volume following exercise.
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