Calf blood flow and posture: Doppler ultrasound measurements during and after exercise

Leeuwen, B. E. Van; Barendsen, G. J.; Lubbers, Jaap; Pater, L. de

doi:10.1152/jappl.1992.72.5.1675

Cited by 31 publications

(24 citation statements)

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“…Existing literature suggests that blood flow to the legs declines to compensate for the increased blood flow demand of the gut, especially after a fatty or protein-rich meal (12,17). However, such observations in animals were possibly confounded by leg movement, which is known to increase regional blood flow to the lower extremity (15). In our comparatively large group of 20 immobilized subjects, this change was not observed.…”

Section: Discussionmentioning

confidence: 56%

Comprehensive assessment of the global and regional vascular responses to food ingestion in humans using novel rapid MRI

Hauser

Muthurangu

Steeden

et al. 2016

American Journal of Physiology-Regulatory, Integrative and Comp

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Comprehensive assessment of the global and regional vascular responses to food ingestion in humans using novel rapid MRI. Am J Physiol Regul Integr Comp Physiol 310: R541-R545, 2016. First published January 13, 2016 doi:10.1152/ajpregu.00454.2015.-Ingestion of food is known to increase mesenteric blood flow. It is not clear whether this increased flow demand is compensated by a rise in cardiac output (CO) alone or by redistribution of blood flow from other organs. We used a new comprehensive imaging method to assess the human cardiovascular response to food ingestion. Following a 12-h fast, blood flow in segments of the aorta and in organspecific arteries, and ventricular volumes were assessed in 20 healthy adults using MRI at rest and following ingestion of a high-energy liquid meal. Systemic vascular resistance (SVR) fell substantially and CO rose significantly. Blood pressure remained stable. These changes were predominantly driven by a rapid fall in mesenteric vascular resistance, resulting in over four times more intestinal blood flow. Renal vascular resistance also declined but less dramatically. No changes in blood flow to the celiac territory, the brain, or the limbs were observed. In conclusion, this is the first study to fully characterize systemic and regional changes in vascular resistance after food ingestion in humans. Our findings show that the postprandial drop in SVR is fully compensated for by increased CO and not by redistribution of blood from other organs. With the exception of a modest increase in renal blood flow, there was no evidence of altered blood flow to nondigestive organs. The proposed oral food challenge protocol can be applied safely in an MRI environment and may be useful for studying the involvement of the gut in systemic or cardiovascular disease.

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Section: Discussionmentioning

confidence: 56%

Comprehensive assessment of the global and regional vascular responses to food ingestion in humans using novel rapid MRI

Hauser

Muthurangu

Steeden

et al. 2016

American Journal of Physiology-Regulatory, Integrative and Comp

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“…These results would suggest that continuous limb movement after exercise is important in maintaining SV and c at higher levels. In the upright position, it has been found that the muscle blood¯ow in the lower extremities decreases rapidly after the cessation of exercise (Leeuwen et al 1992). It has been demonstrated that the perfusion pressure in the legs during exercise is increased because venous pressure is decreased by the pumping action of the exercising muscles (Laughlin 1987;Stick et al 1992).…”

Section: Discussionmentioning

confidence: 99%

Influence of light physical activity on cardiac responses during recovery from exercise in humans

Takahashi

Miyamoto

1998

European Journal of Applied Physiology

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To examine the influence of light exercise on cardiac responses during recovery from exercise, we measured heart rate (HR), stroke volume (SV), and cardiac output (Qc) in five healthy untrained male subjects in an upright position before, during, and after 10-min steady-state cycle exercise at an exercise intensity of 170 W, corresponding to a mean of 68 (SD 4)% of maximal oxygen uptake. The recovery phase was evaluated separately for three different conditions: 10 min of complete rest (passive recovery), 7 min of pedalling at 20-W exercise intensity followed by 3 min of rest (partially active recovery), and 7 min of pedalling at 40-W exercise intensity followed by 3 min of rest (partially active recovery), on an upright cycle ergometer. The time courses of decreases in HR in the two active recovery phases at different exercise intensities were almost identical to those in the passive recovery phase. However, the subsequent HR reductions during the rest after active recovery at 20 W and at 40 W were mean 7.5 (SD 4.4) and mean 10.0 (SD 3.1) beats x min(-1), respectively, both of which were significantly larger (P < 0.05 and P< 0.005) than the corresponding reduction [1.4 (SD 2.5) beats min(-1)] for passive recovery. The SV values at the two exercise intensities during the active recovery periods were maintained at levels similar to that during 170-W steady-state exercise. In contrast, the SV during passive recovery decreased gradually to a level significantly below the initial baseline level at rest before exercise (P < 0.05). The resultant time courses of CO values during active recovery were significantly higher (each P < 0.05) than that during passive recovery. It was concluded from these findings that light post-exercise physical activity plays an important role in facilitating the venous return from the muscles and in restoring the elevated HR to the pre-exercise resting level.

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“…Given the complexity of the operation of muscle tissue and the dynamically regulated interplay of local versus global controls of blood perfusion in response to the tissue demand for oxygen, mechanical effects, and aggregation of feedback metabolites, it is no wonder that muscle physiology and diseases thereof remain a highly active field of study. 5,[10][11][12][13][14][15][16][17] Our particular interest is the mechanism of local muscle action and the specific pathology of peripheral arterial disease (PAD). PAD is emphasized in muscle research because it is associated with a rather high morbidity and has a distinctly detrimental effect on the patient's health and quality of life.…”

Section: Introductionmentioning

confidence: 99%

Hybrid diffuse optical techniques for continuous hemodynamic measurement in gastrocnemius during plantar flexion exercise

et al. 2015

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Abstract. Occlusion calibrations and gating techniques have been recently applied by our laboratory for continuous and absolute diffuse optical measurements of forearm muscle hemodynamics during handgrip exercises. The translation of these techniques from the forearm to the lower limb is the goal of this study as various diseases preferentially affect muscles in the lower extremity. This study adapted a hybrid near-infrared spectroscopy and diffuse correlation spectroscopy system with a gating algorithm to continuously quantify hemodynamic responses of medial gastrocnemius during plantar flexion exercises in 10 healthy subjects. The outcomes from optical measurement include oxy-, deoxy-, and total hemoglobin concentrations, blood oxygen saturation, and relative changes in blood flow (rBF) and oxygen consumption rate (r _ VO 2 ). We calibrated rBF and r _ VO 2 profiles with absolute baseline values of BF and _ VO 2 obtained by venous and arterial occlusions, respectively. Results from this investigation were comparable to values from similar studies. Additionally, significant correlation was observed between resting local muscle BF measured by the optical technique and whole limb BF measured concurrently by a strain gauge venous plethysmography. The extensive hemodynamic and metabolic profiles during exercise will allow for future comparison studies to investigate the diagnostic value of hybrid technologies in muscles affected by disease.

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Calf blood flow and posture: Doppler ultrasound measurements during and after exercise

Cited by 31 publications

References 0 publications

Comprehensive assessment of the global and regional vascular responses to food ingestion in humans using novel rapid MRI

Comprehensive assessment of the global and regional vascular responses to food ingestion in humans using novel rapid MRI

Influence of light physical activity on cardiac responses during recovery from exercise in humans

Hybrid diffuse optical techniques for continuous hemodynamic measurement in gastrocnemius during plantar flexion exercise

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