Skeletal muscle perfusion measurements using adiabatic inversion of arterial water.
Quantitative NMR measurements of perfusion using magnetic labeling of arterial water have been demonstrated previously in several different highly perfused organs. The success of these previous experiments suggested that arterial labeling may be of use in measuring perfusion in skeletal muscle, where resting perfusion is very low and where increased perfusion after exercise is transient. In the experiments described in this paper, adiabatic inversion of arterial water has been used to make single-voxel measurements of perfusion in the lower hind limb of rats. At rest, the NMR results were quantified to yield a perfusion rate of about 13.8 ml/100g/min. After perturbation due to ischemic exercise, large relative changes in the NMR signal were observed. The peak change of about 2.5% of the NMR signal occurred shortly after perturbation and was followed by a return to resting levels over a period of about 4 min.
Marro
K I
KI
Center for Bioengineering, University of Washington, Seattle 98195-7115, USA.
Kushmerick
M J
MJ
D000818:Animals; D001158:Arteries; D006614:Hindlimb; D007511:Ischemia / Q000503:physiopathology; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008297:Male; D009119:Muscle Contraction; D018482:Muscle, Skeletal / Q000098:blood supply*; D051381:Rats; D017207:Rats, Sprague-Dawley; D012039:Regional Blood Flow; D012146:Rest; D013113:Spin Labels
D013113:Spin Labels