Document Detail


Femoral vascular occlusion and ventilation during recovery from heavy exercise.
MedLine Citation:
PMID:  8272586     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Ventilation and cardiac output subside gradually following cessation of exercise, which is commonly linked to the slow wash-out of materials from the recovering muscles. The effect of hindering the removal of the metabolic products of heavy cycle exercise on the kinetics of ventilation and gas exchange was studied in 5 subjects by occluding the femoral circulation with cuffs during the first 2 min of recovery (15 tests). Fifteen undisturbed recoveries served as controls. Compared to spontaneous recovery, circulatory obstruction induced an immediate (from the first breath) decrease in minute ventilation (VE), while end-tidal CO2 (PETCO2) as well as lactate and K+ in venous blood at forearm did not change significantly. A ventilatory deficit of 27 +/- 9 L was observed from the 2 min of occlusion. Following cuff deflation, VE rose 2-3 breaths after PETCO2 began to increase in every subject. The mechanisms of the normocapnic reduction of VE during occlusion, as well as the rise of ventilation following cuff release, are still unclear. However, these results argue against any significant role for hyperpnea-inducing intramuscular chemoreception, or point to muscular perfusion as a prerequisite of such a mechanism to operate.
Authors:
P Haouzi; A Huszczuk; J Porszasz; B Chalon; K Wasserman; B J Whipp
Related Documents :
23075556 - Bovine colostrum and immune function after exercise.
7967216 - Control of ventilation during exercise in man with special reference to the feature at ...
3016196 - Myopathy with abnormal mitochondria, transient low electron transport capacity in the r...
6380936 - Experimental evaluation of high-frequency jet ventilation.
2607446 - Effect of sympathetic nerves on composition and distensibility of cerebral arterioles i...
3265356 - Ventilatory threshold and training heart rate in exercising cardiac patients.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Respiration physiology     Volume:  94     ISSN:  0034-5687     ISO Abbreviation:  Respir Physiol     Publication Date:  1993 Nov 
Date Detail:
Created Date:  1994-02-03     Completed Date:  1994-02-03     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0047142     Medline TA:  Respir Physiol     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  137-50     Citation Subset:  IM    
Affiliation:
Division of Respiratory and Critical Care, Physiology and Medicine, Harbor-UCLA Medical Center, Torrance.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Carbon Dioxide
Constriction
Exercise*
Forearm / blood supply
Heart Rate
Humans
Lactates / blood
Lactic Acid
Leg / blood supply*
Male
Potassium / blood
Respiration*
Tidal Volume
Veins
Chemical
Reg. No./Substance:
0/Lactates; 124-38-9/Carbon Dioxide; 50-21-5/Lactic Acid; 7440-09-7/Potassium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Evidence for an intramuscular ventilatory stimulus during dynamic exercise in man.
Next Document:  Pulmonary chemoreflex and phrenic sympathetic efferents.