Breathing pattern in patients with Parkinson's disease.
Identifieur interne : 001362 ( PubMed/Corpus ); précédent : 001361; suivant : 001363Breathing pattern in patients with Parkinson's disease.
Auteurs : L. Vercueil ; J P Linard ; B. Wuyam ; P. Pollak ; G. BenchetritSource :
- Respiration physiology [ 0034-5687 ] ; 1999.
English descriptors
- KwdEn :
- MESH :
- chemical , therapeutic use : Antiparkinson Agents, Levodopa.
- drug effects : Respiratory Mechanics.
- drug therapy : Parkinson Disease.
- physiopathology : Parkinson Disease.
- Aged, Female, Humans, Male, Middle Aged.
Abstract
The improvement in motor performance resulting from levodopa administration in patients with Parkinson's disease (PD) provides the opportunity to investigate ventilatory changes brought about by the disease. The aim of this study has been to investigate these changes in order to specify the mechanisms of the impairment in breathing in PD. Breathing patterns at rest were investigated in 11 patients with idiopathic PD both before (OFF) and after (ON) administration of levodopa at a dose improving their motor performance by at least 30%. Airflow (Fleisch head mounted on a mask), rib cage and abdomen movements (inductance plethysmography) were recorded in the OFF condition 1 h after subjects woke up. Subjects then received levodopa and a new set of recordings was obtained 1 h later, in the ON condition. Breath-by-breath processing of recordings was carried out, and tidal volume (VT), inspiratory (TI) and expiratory (TE) durations were measured. The main finding was a lengthening of TI resulting in a decrease in ventilation and in VT/TI, and an increase in TI/TTOT in the ON compared to the OFF condition. In the ON condition abnormal rib cage-abdomen plots patterns were found in four out of six subjects. A hypothesis on the effect of PD on breathing is proposed on grounds of normal diaphragmatic activity but impaired activity of the other respiratory muscles and more specifically the intercostal muscles.
PubMed: 10647860
Links to Exploration step
pubmed:10647860Le document en format XML
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<author><name sortKey="Vercueil, L" sort="Vercueil, L" uniqKey="Vercueil L" first="L" last="Vercueil">L. Vercueil</name>
<affiliation><nlm:affiliation>Clinique Neurologique, INSERM U-318, Centre Hospitalier Universitaire, La Tronche, France.</nlm:affiliation>
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<author><name sortKey="Linard, J P" sort="Linard, J P" uniqKey="Linard J" first="J P" last="Linard">J P Linard</name>
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<author><name sortKey="Wuyam, B" sort="Wuyam, B" uniqKey="Wuyam B" first="B" last="Wuyam">B. Wuyam</name>
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<author><name sortKey="Pollak, P" sort="Pollak, P" uniqKey="Pollak P" first="P" last="Pollak">P. Pollak</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aged</term>
<term>Antiparkinson Agents (therapeutic use)</term>
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<term>Humans</term>
<term>Levodopa (therapeutic use)</term>
<term>Male</term>
<term>Middle Aged</term>
<term>Parkinson Disease (drug therapy)</term>
<term>Parkinson Disease (physiopathology)</term>
<term>Respiratory Mechanics (drug effects)</term>
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<keywords scheme="MESH" type="chemical" qualifier="therapeutic use" xml:lang="en"><term>Antiparkinson Agents</term>
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<keywords scheme="MESH" qualifier="drug effects" xml:lang="en"><term>Respiratory Mechanics</term>
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<front><div type="abstract" xml:lang="en">The improvement in motor performance resulting from levodopa administration in patients with Parkinson's disease (PD) provides the opportunity to investigate ventilatory changes brought about by the disease. The aim of this study has been to investigate these changes in order to specify the mechanisms of the impairment in breathing in PD. Breathing patterns at rest were investigated in 11 patients with idiopathic PD both before (OFF) and after (ON) administration of levodopa at a dose improving their motor performance by at least 30%. Airflow (Fleisch head mounted on a mask), rib cage and abdomen movements (inductance plethysmography) were recorded in the OFF condition 1 h after subjects woke up. Subjects then received levodopa and a new set of recordings was obtained 1 h later, in the ON condition. Breath-by-breath processing of recordings was carried out, and tidal volume (VT), inspiratory (TI) and expiratory (TE) durations were measured. The main finding was a lengthening of TI resulting in a decrease in ventilation and in VT/TI, and an increase in TI/TTOT in the ON compared to the OFF condition. In the ON condition abnormal rib cage-abdomen plots patterns were found in four out of six subjects. A hypothesis on the effect of PD on breathing is proposed on grounds of normal diaphragmatic activity but impaired activity of the other respiratory muscles and more specifically the intercostal muscles.</div>
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<Abstract><AbstractText>The improvement in motor performance resulting from levodopa administration in patients with Parkinson's disease (PD) provides the opportunity to investigate ventilatory changes brought about by the disease. The aim of this study has been to investigate these changes in order to specify the mechanisms of the impairment in breathing in PD. Breathing patterns at rest were investigated in 11 patients with idiopathic PD both before (OFF) and after (ON) administration of levodopa at a dose improving their motor performance by at least 30%. Airflow (Fleisch head mounted on a mask), rib cage and abdomen movements (inductance plethysmography) were recorded in the OFF condition 1 h after subjects woke up. Subjects then received levodopa and a new set of recordings was obtained 1 h later, in the ON condition. Breath-by-breath processing of recordings was carried out, and tidal volume (VT), inspiratory (TI) and expiratory (TE) durations were measured. The main finding was a lengthening of TI resulting in a decrease in ventilation and in VT/TI, and an increase in TI/TTOT in the ON compared to the OFF condition. In the ON condition abnormal rib cage-abdomen plots patterns were found in four out of six subjects. A hypothesis on the effect of PD on breathing is proposed on grounds of normal diaphragmatic activity but impaired activity of the other respiratory muscles and more specifically the intercostal muscles.</AbstractText>
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