scholarly journals A left lateral body position increases pulmonary vein stress in healthy humans

2021 ◽  
Vol 9 (18) ◽  
Author(s):  
Lisa A. Gottlieb ◽  
Dounia El Hamrani ◽  
Jérôme Naulin ◽  
Lorena Sanchez Y. Blanco ◽  
Jérôme Lamy ◽  
...  
Keyword(s):  
Pulmonary Vein ◽  
Body Position ◽  
Healthy Humans ◽  
Lateral Body

INFLUENCE OF BODY POSITION ON PULMONARY VENTILATION DURING ARREST AND RELEASE OF LOWER LIMB CIRCULATION AFTER EXERCISE IN HEALTHY HUMANS

2020 ◽  
Vol 34 (S1) ◽  
pp. 1-1
Author(s):  
Tamires da Silva Cesar ◽  
Ana Luiza Sayegh ◽  
Diogo Oliveira ◽  
Mariana Rabelo ◽  
Luiz Eduardo Nery ◽  
...  
Keyword(s):  
Lower Limb ◽  
Body Position ◽  
Pulmonary Ventilation ◽  
Healthy Humans

scholarly journals Self-Reported Onset of Paroxysmal Atrial Fibrillation Is Related to Sleeping Body Position

2021 ◽  
Vol 12 ◽  
Author(s):  
Lisa A. Gottlieb ◽  
Lorena Sanchez y Blanco ◽  
Mélèze Hocini ◽  
Lukas R. C. Dekker ◽  
Ruben Coronel
Keyword(s):  
Atrial Fibrillation ◽  
Body Position ◽  
Lateral Position ◽  
University Hospital ◽  
Ablation Therapy ◽  
Left Lateral Position ◽  
Treatment And Prevention ◽  
Lateral Body ◽  
History Of ◽  
Underlying Mechanisms

Background: Because stretch of the atrial myocardium is proarrhythmic for atrial fibrillation (AF) and a left lateral body position increases atrial dimensions in humans, we hypothesized that left lateral recumbence is a frequent AF-triggering body position in AF patients.Methods: We performed a questionnaire study of symptomatic paroxysmal AF (episodes of AF < 1 week) patients scheduled for a first AF ablation therapy at Catharina Hospital, Eindhoven, the Netherlands and at University Hospital, Bordeaux, France.Results: Ninety-four symptomatic paroxysmal AF patients were included [mean age 61 ± 11 years, median AF history of 29(48) months, 31% were females]. Twenty-two percent of patients reported a specific body position as a trigger of their AF symptoms. The triggering body position was left lateral position in 57% of cases, supine position in 33%, right lateral position in 10%, and prone position in 5% (p = 0.003 overall difference in prevalence). Patients with positional AF had a higher body mass index compared to patients without nocturnal/positional AF [28.7(4.2) and 25.4(5.2) kg/m2, respectively, p = 0.025], but otherwise resembled these patients.Conclusion: Body position, and the left lateral position, in particular, is a common trigger of AF in symptomatic AF patients. Moreover, positional AF is associated with overweight. Understanding of the underlying mechanisms of positional AF can contribute to AF treatment and prevention.

scholarly journals Does Obstructive Sleep Apnea Worsen During REM Sleep?

2013 ◽  
pp. 569-575 ◽  
Author(s):  
I. PEREGRIM ◽  
S. GREŠOVÁ ◽  
M. PALLAYOVÁ ◽  
B. L. FULTON ◽  
J. ŠTIMMELOVÁ ◽  
...  
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Rem Sleep ◽  
Body Position ◽  
Statistical Significance ◽  
Nrem Sleep ◽  
Sleep Stages ◽  
Lateral Body ◽  
Obstructive Sleep ◽  
Significant Difference

Although it is thought that obstructive sleep apnea (OSA) is worse during rapid eye movement (REM) sleep than in non-REM (NREM) sleep there are some uncertainties, especially about apnoe-hypopnoe-index (AHI). Several studies found no significant difference in AHI between both sleep stages. However, REM sleep is associated more with side sleeping compared to NREM sleep, which suggests that body position is a possible confounding factor. The main purpose of this study was to compare the AHI in REM and NREM sleep in both supine and lateral body position. A retrospective study was performed on 422 consecutive patients who underwent an overnight polysomnography. Women had higher AHI in REM sleep than NREM sleep in both supine (46.05±26.26 vs. 23.91±30.96, P<0.01) and lateral (18.16±27.68 vs. 11.30±21.09, P<0.01) body position. Men had higher AHI in REM sleep than NREM sleep in lateral body position (28.94±28.44 vs. 23.58±27.31, P<0.01), however, they did not reach statistical significance in supine position (49.12±32.03 in REM sleep vs. 45.78±34.02 in NREM sleep, P=0.50). In conclusion, our data suggest that REM sleep is a contributing factor for OSA in women as well as in men, at least in lateral position.

Perceived Body Position under Lateral Body Tilt

1969 ◽  
Author(s):  
A. Harvey Baker ◽  
Leonard Cirillo ◽  
Seymour Wapner
Keyword(s):  
Body Position ◽  
Body Tilt ◽  
Lateral Body

Method of Stimulus Presentation and Apparent Body Position under Lateral Body Tilt

1967 ◽  
Vol 24 (1) ◽  
pp. 43-50 ◽  
Author(s):  
M. Bauermeister ◽  
S. Wapner ◽  
H. Werner
Keyword(s):  
Reference System ◽  
Body Position ◽  
Body Schema ◽  
Stimulus Presentation ◽  
Body Axis ◽  
Body Tilt ◽  
Spatial Reference ◽  
Longitudinal Body Axis ◽  
Lateral Body ◽  
Method Of Constant Stimuli

Eighty Ss, 40 male and 40 female, indicated by means of a luminescent rod the location of their longitudinal body axis (apparent body position) under body tilt ranging from 90° left (counterclockwise), through upright, to 90° right (clockwise). The luminescent rod was presented by two psychophysical methods: (a) the method of limits and (b) the method of constant stimuli. Deviations of apparent from objective body position showed significant differences between the two methods. The results were interpreted in terms of an organismic theory of perception, utilizing the notion of a dynamic body schema as spatial reference system which was subject to modifications due to the method of stimulus presentation.

scholarly journals The effect of sex and body weight on lung volumes during sleep

SLEEP ◽  
2019 ◽  
Vol 42 (10) ◽  
Author(s):  
Joanne Avraam ◽  
Andrew Dawson ◽  
Peter D Rochford ◽  
Danny J Brazzale ◽  
Fergal J O’donoghue ◽  
...  
Keyword(s):  
Body Weight ◽  
Sleep Stage ◽  
Body Position ◽  
Nrem Sleep ◽  
Normal Weight ◽  
Repeated Measurements ◽  
Similar Amount ◽  
Lung Volumes ◽  
Lateral Body ◽  
Obstructive Sleep

Abstract Study Objectives Low lung volumes are thought to contribute to obstructive sleep apnea (OSA). OSA is worse in the supine versus lateral body position, men versus women, obese versus normal-weight (NW) individuals and REM versus NREM sleep. All of these conditions may be associated with low lung volumes. The aim was to measure FRC during wake, NREM, and REM in NW and overweight (OW) men and women while in the supine and lateral body positions. Methods Eighty-one healthy adults were instrumented for polysomnography, but with nasal pressure replaced with a sealed, non-vented mask connected to an N2 washout system. During wakefulness and sleep, repeated measurements of FRC were made in both supine and right lateral positions. Results Two hundred eighty-five FRC measures were obtained during sleep in 29 NW (body mass index [BMI] = 22 ± 0.3 kg/m2) and 29 OW (BMI = 29 ± 0.7 kg/m2) individuals. During wakefulness, FRC differed between BMI groups and positions (supine: OW = 58 ± 3 and NW = 68 ± 3% predicted; lateral OW = 71 ± 3, NW = 81 ± 3% predicted). FRC fell from wake to NREM sleep in all participants and in both positions by a similar amount. As a result, during NREM sleep FRC was lower in OW than NW individuals (supine 46 ± 3 and 56 ± 3% predicted, respectively). FRC during REM was similar to NREM and no sex differences were observed in any position or sleep stage. Conclusions Reductions in FRC while supine and with increased body weight may contribute to worsened OSA in these conditions, but low lung volumes appear unlikely to explain the worsening of OSA in REM and in men versus women.

ProSeal exchange using a gum elastic bougie in the lateral body position

Anaesthesia ◽  
2003 ◽  
Vol 58 (11) ◽  
pp. 1133-1134 ◽  
Author(s):  
J. Brimacombe ◽  
T Diprose ◽  
Y. Lim ◽  
C. Keller
Keyword(s):  
Body Position ◽  
Lateral Body

scholarly journals Dynamic MRI of the pelvic floor: comparison of performance in supine vs left lateral body position

2018 ◽  
Vol 91 (1092) ◽  
pp. 20180393 ◽  
Author(s):  
Khoschy Schawkat ◽  
Bettina Pfister ◽  
Helen Parker ◽  
Henriette Heinrich ◽  
Borna K Barth ◽  
...  
Keyword(s):  
Pelvic Floor ◽  
Body Position ◽  
Dynamic Mri ◽  
Lateral Body

scholarly journals An Analysis of Ocular Counterrolling in Response to Body Positions in Three-Dimensional Space

1992 ◽  
Vol 2 (3) ◽  
pp. 213-220 ◽  
Author(s):  
Urs J. Bucher ◽  
Fred Mast ◽  
Norbert Bischof
Keyword(s):  
Dimensional Space ◽  
Body Position ◽  
Three Dimensional ◽  
Normal Subjects ◽  
Roll Angle ◽  
Otolith Organs ◽  
Lateral Body ◽  
Pitch Direction ◽  
Periodic Characteristic ◽  
Ocular Counterrolling

Four normal subjects underwent ocular counterrolling testing in a tiltable chair. Measurements were taken in 62 different body positions in steps of 30∘ varied rolls and pitches. In each body position the eyes were recorded on video and their roll angle was determined automatically by computer analysis. The ocular counterrolling profile showed a periodic characteristic with maximal amplitude at roll tilts of 60∘. In this study we can clearly show that the eyes’ rolling response is not systematically affected when lateral body tilts are combined with any tilts in the pitch direction. This undoubtedly implies that the ocular counterrolling was mainly stimulated by the subject’s roll angle. As an empirical contribution, this study provides new data specially to be used in modelling and simulating the function of otolith organs.

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