![](/images/graphics-bg.png)
Echocardiographic Measures of Diastolic Function Are Preload Dependent during Triggered Positive Pressure Ventilation : A Controlled Crossover Study in Healthy Subjects
Joint Authors
Frederiksen, Christian Alcaraz
Juhl-Olsen, Peter
Sloth, Erik
Jakobsen, Carl-Johan
Hermansen, Johan Fridolf
Source
Critical Care Research and Practice
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-09-25
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Background.
The use of echocardiography in intensive care settings impacts decision making.
A prerequisite for the use of echocardiography is relative resistance to changes in volume status and levels of positive pressure ventilation (PPV).
Studies on indices of diastolic function report conflicting results with regard to dependence on volume status.
Evidence is scarce on PPV.
Methods.
Ten healthy subjects were exposed to 6 levels of positive end-expiratory pressure (PEEP) and pressure support (PS) following a baseline reading.
All ventilator settings were performed at three positions: horizontal, reverse-Trendelenburg, and Trendelenburg.
Echocardiography was performed throughout.
Results.
During spontaneous breathing, early diastolic transmitral velocity (E) changed with positioning (P<0.001), whereas early diastolic velocity of the mitral annulus (e′) was independent (P=0.263).
With PPV, E and e′ proved preload dependent (P values<0.001).
Increases in PEEP, PS, or a combination influenced E and e′ in reverse-Trendelenburg- and horizontal positions, but not in the Trendelenburg position.
Discussion.
The change towards preload dependency of e′ with PPV suggests that PPV increases myocardial preload sensitivity.
The susceptibility of E and e′ to preload changes during PPV discourages their use in settings of volume shifts or during changes in ventilator settings.
Conclusion.
Positioning and PPV affect E and e′.
American Psychological Association (APA)
Juhl-Olsen, Peter& Frederiksen, Christian Alcaraz& Hermansen, Johan Fridolf& Jakobsen, Carl-Johan& Sloth, Erik. 2012. Echocardiographic Measures of Diastolic Function Are Preload Dependent during Triggered Positive Pressure Ventilation : A Controlled Crossover Study in Healthy Subjects. Critical Care Research and Practice،Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-491804
Modern Language Association (MLA)
Juhl-Olsen, Peter…[et al.]. Echocardiographic Measures of Diastolic Function Are Preload Dependent during Triggered Positive Pressure Ventilation : A Controlled Crossover Study in Healthy Subjects. Critical Care Research and Practice No. 2012 (2012), pp.1-8.
https://search.emarefa.net/detail/BIM-491804
American Medical Association (AMA)
Juhl-Olsen, Peter& Frederiksen, Christian Alcaraz& Hermansen, Johan Fridolf& Jakobsen, Carl-Johan& Sloth, Erik. Echocardiographic Measures of Diastolic Function Are Preload Dependent during Triggered Positive Pressure Ventilation : A Controlled Crossover Study in Healthy Subjects. Critical Care Research and Practice. 2012. Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-491804
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-491804