Cardiac metabolism during exercise in healthy volunteers measured by 31P magnetic resonance spectroscopy
AUTOR(ES)
Conway, Michael A
RESUMO
A technique was devised for individuals to exercise prone in a magnet during magnetic resonance spectroscopy of the heart and phosphorus-31 magnetic resonance spectra of the heart were obtained by the phase modulated rotating frame imaging technique in six healthy volunteers during steady state dynamic quadriceps exercise. During prone exercise heart rate, blood pressure, and total body oxygen consumption were measured at increasing loads and the results were compared with those during Bruce protocol treadmill exercise. During prone exercise with a 5 kg load the heart rate was similar and the systolic and diastolic blood pressures were higher than those during stage 1 of the Bruce protocol. The rate-pressure products were similar but the total body oxygen consumption was lower during prone exercise. There was no difference in the ratio of phosphocreatine to adenosine triphosphate during rest and exercise.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1024458Documentos Relacionados
- Functional pools of oxidative and glycolytic fibers in human muscle observed by 31P magnetic resonance spectroscopy during exercise.
- Fructose-induced aberration of metabolism in familial gout identified by 31P magnetic resonance spectroscopy.
- 31P Nuclear Magnetic Resonance Spectroscopy of Native and Recombined Lipoproteins
- Energy metabolism of the untrained muscle of elite runners as observed by 31P magnetic resonance spectroscopy: evidence suggesting a genetic endowment for endurance exercise.
- Intracellular pH of Cotton Embryos and Seed Coats during Fruit Development Determined by 31P Nuclear Magnetic Resonance Spectroscopy
