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- W2083993709 abstract "Background and hypothesis: Decreased blood flow to working muscles makes an important contribution to exercise intolerance in patients with chronic heart failure. This study was undertaken to examine whether maldistribution of skeletal muscle blood flow is closely related to exercise intolerance in patients with cardiac dysfunction. Methods: Whole-body thallium scintigraphy was performed during one-leg exercise in 11 patients with left ventricular (LV) dysfunction (LV ejection fraction <45%). Blood flow distribution to the exercising and resting legs was quantified by expressing regional thallium counts as a percentage of the whole-body counts at rest, at the level of anaerobic threshold, and at peak exercise. Results: At anaerobic threshold, the thallium activity of exercising muscle increased from 4.2 ± 0.7 to 14.0 ± 2.5% (p< 0.05) in the thigh and from 1.7 ± 0.3 to 4.1 ± 0.9% (p<0.05) in the calf, compared with the resting value. Consequently, the ratio of thallium activity between exercising and resting legs increased to 2.7 ± 0.7 (p<0.05) in the thigh and to 2.3 ± 0.7 (p < 0.05) in the calf. When plotted as a function of anaerobic threshold, thallium activity of the exercising thigh (r = 0.78, p<0.05) and the thallium ratio between exercising and resting thigh (r = 0.69, p<0.05) declined with the reduction of exercise tolerance. These correlations were not observed in calves. Conclusion: Whole-body thallium scintigraphy demonstrated a maldistribution of leg blood flow in patients with reduced aerobic exercise capacity, suggesting that this abnormality could play an important role in exercising intolerance in these patients." @default.
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- W2083993709 date "1997-09-01" @default.
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- W2083993709 title "Quantitative evaluation of blood row distribution to exercising and resting skeletal muscles in patients with cardiac dysfunction using whole-body thallium-201 scintigraphy" @default.
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- W2083993709 doi "https://doi.org/10.1002/clc.4960200914" @default.
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