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- Title
Interactions between respiration and systemic hemodynamics. Part II: practical implications in critical care.
- Authors
Feihl, François; Broccard, Alain F.
- Abstract
In Part I of this review, we have covered basic concepts regarding cardiorespiratory interactions. Here, we put this theoretical framework to practical use. We describe mechanisms underlying Kussmaul’s sign and pulsus paradoxus. We review the literature on the use of respiratory variations of blood pressure to evaluate volume status. We show the possibilities of attaining the latter aim by investigating with ultrasonography how the geometry of great veins fluctuates with respiration. We provide a Guytonian analysis of the effects of PEEP on cardiac output. We terminate with some remarks on the potential of positive pressure breathing to induce acute cor pulmonale, and on the cardiovascular mechanisms that at times may underly the failure to wean a patient from the ventilator.
- Subjects
CARDIOPULMONARY system; BLOOD pressure; HEMODYNAMICS; CRITICAL care medicine; THERAPEUTICS
- Publication
Intensive Care Medicine, 2009, Vol 35, Issue 2, p198
- ISSN
0342-4642
- Publication type
Article
- DOI
10.1007/s00134-008-1298-y