AustralieFrV1, Main, Exploration, bibRecord, 00CA64

Time course of pulmonary artery pressure during sleep in sleep apnoea syndrome : role of recurrent apnoeas

Identifieur interne : 00CA64 ( Main/Exploration ); précédent : 00CA63; suivant : 00CA65

Time course of pulmonary artery pressure during sleep in sleep apnoea syndrome : role of recurrent apnoeas

Auteurs : E. Sforza [France] ; L. Laks [Australie] ; R. R. Grunstein [Australie] ; J. Krieger [France] ; C. E. Sullivan [Australie]

Source :

The European respiratory journal [ 0903-1936 ] ; 1998.

RBID : Pascal:98-0163727

Descripteurs français

Pascal (Inist)
- Apnée, Sommeil, Hypoxémie, Monitorage, Pression artérielle, Artère pulmonaire, Exploration, Homme.
Wicri :
- topic : Homme.

English descriptors

KwdEn :
- Apnea, Arterial pressure, Exploration, Human, Hypoxemia, Monitoring, Pulmonary artery, Sleep.

Abstract

Recent results in animals have suggested that repetition of hypoxaemic stimuli may result in a progressive increase in pulmonary arterial pressure (Ppa). The purpose of the present study was to investigate the effects of recurrent obstructive apnoeas on Ppa. We have, therefore, examined the nocturnal trend of Ppa in seven obstructive sleep apnoea syndrome (OSAS) patients and in five snorers. Mean Ppa was measured before, at the start, at the end and after the selected apnoeas. The analysis was performed for each I h period for at least 7 h throughout the night on at least 10 randomly selected apnoeas per hour. In snorers, 100 randomly chosen values were measured during every hour of the night. In the morning after the nocturnal study, the Ppa responses to acute hypoxia and hypercapnia were measured. No Ppa changes throughout the 7 h were found during sleep in snorers (Ppa slope:-0.002±0.10 mmHg.h^-1). In OSAS patients a small but significant increase in Ppa throughout the night was noted, affecting the values before (Ppa slope: 0.7+0.16 mm Hg.h^-1), at the start of apnoea (Ppa slope: 0.53±0.1 mmHg.h^-1) as well as at the end (Ppa slope: 0.44±0.08 mmHg.h^-1) and in the postapnoeic period (Ppa slope: 0.55±0.1 mmHg.h^-1). When we limited the analysis to nonrapid eye movement (NREM) sleep, a trend in progressive Ppa was also present, irrespective of changes in apnoea duration and apnoea desaturation. The Ppa rise during the night was not affected by diurnal Ppa pulmonary vascular response to hypoxia and hypercapnia or indices of sleep apnoea severity. We conclude that in obstructive sleep apnoea, pulmonary artery pressure progressively increases during the night, reflecting the cumulative effects of apnoeas and nocturnal hypoxaemia.

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">Recent results in animals have suggested that repetition of hypoxaemic stimuli may result in a progressive increase in pulmonary arterial pressure (Ppa). The purpose of the present study was to investigate the effects of recurrent obstructive apnoeas on Ppa. We have, therefore, examined the nocturnal trend of Ppa in seven obstructive sleep apnoea syndrome (OSAS) patients and in five snorers. Mean Ppa was measured before, at the start, at the end and after the selected apnoeas. The analysis was performed for each I h period for at least 7 h throughout the night on at least 10 randomly selected apnoeas per hour. In snorers, 100 randomly chosen values were measured during every hour of the night. In the morning after the nocturnal study, the Ppa responses to acute hypoxia and hypercapnia were measured. No Ppa changes throughout the 7 h were found during sleep in snorers (Ppa slope:-0.002±0.10 mmHg.h<sup>-1</sup>
). In OSAS patients a small but significant increase in Ppa throughout the night was noted, affecting the values before (Ppa slope: 0.7+0.16 mm Hg.h<sup>-1</sup>
), at the start of apnoea (Ppa slope: 0.53±0.1 mmHg.h<sup>-1</sup>
) as well as at the end (Ppa slope: 0.44±0.08 mmHg.h<sup>-1</sup>
) and in the postapnoeic period (Ppa slope: 0.55±0.1 mmHg.h<sup>-1</sup>
). When we limited the analysis to nonrapid eye movement (NREM) sleep, a trend in progressive Ppa was also present, irrespective of changes in apnoea duration and apnoea desaturation. The Ppa rise during the night was not affected by diurnal Ppa pulmonary vascular response to hypoxia and hypercapnia or indices of sleep apnoea severity. We conclude that in obstructive sleep apnoea, pulmonary artery pressure progressively increases during the night, reflecting the cumulative effects of apnoeas and nocturnal hypoxaemia.</div>
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Time course of pulmonary artery pressure during sleep in sleep apnoea syndrome : role of recurrent apnoeas

Time course of pulmonary artery pressure during sleep in sleep apnoea syndrome : role of recurrent apnoeas

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri